AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON FEBRUARY 18, 2000

                                                      Registration No. 333-94499
================================================================================

                      SECURITIES AND EXCHANGE COMMISSION


                         PRE-EFFECTIVE AMENDMENT NO. 2

                                   FORM S-3

            REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

                             MICROSOFT CORPORATION
- --------------------------------------------------------------------------------
             (Exact name of registrant as specified in its charter)

          Washington                                    91-1144442
(State or other jurisdiction                          (IRS Employer
of incorporation or organization)                   Identification No.)


- --------------------------------------------------------------------------------
                               One Microsoft Way
                        Redmond, Washington  98052-6399
                                (425) 882-8080
                  (Address, including zip code, and telephone
             number including area code, of registrant's principal
                               executive office)
                   ----------------------------------------
                              Robert A. Eshelman
                    General Counsel, Finance and Operations
                               One Microsoft Way
                        Redmond, Washington  98052-6399
                                (425) 882-8080
           (Name, address, including zip code, and telephone number,
                  including area code, of agent for service)


- --------------------------------------------------------------------------------
                       Copies of all communications to:

                           Christopher H. Cunningham
                           Preston Gates & Ellis LLP
                          5000 Bank of America Tower
                               701 Fifth Avenue
                        Seattle, Washington  98104-7078
                   ----------------------------------------

================================================================================


          Approximate date of commencement of proposed sale to the public: At
such time or times after the effective date of this Registration Statement as
the selling shareholders shall determine.

          If the only securities being registered on this form are being offered
pursuant to dividend or interest reinvestment plans, please check the following
box:                                                                  [_]

          If any of the securities being registered on this Form are to be
offered on a delayed or continuous basis pursuant to Rule 415 under the
Securities Act of 1933, other than securities offered only in connection with
dividend or interest reinvestment plans, please check the following box:
                                                                      [X]

          If this Form is filed to register additional securities for an
offering pursuant to Rule 462(b) under the Securities Act, please check the
following box and list the Securities Act registration statement number of the
earlier effective registration statement for the same offering.       [_]

          If this Form is a post-effective amendment filed pursuant to Rule
462(c) under the Securities Act, check the following box and list the Securities
Act registration statement number of the earlier effective registration
statement for the same offering.                                      [_]

          If delivery of the prospectus is expected to be made pursuant to Rule
434, please check the following box.                                  [_]

          The registrant hereby amends this registration statement on such date
or dates as may be necessary to delay its effective date until the registrant
shall file a further amendment which specifically states that this registration
statement shall thereafter become effective in accordance with section 8(a) of
the Securities Act of 1933 or until the registration statement shall become
effective on such date as the Commission, acting pursuant to said section 8(a),
may determine.


                The Index to Exhibits is located at Page II-4.


                                  PROSPECTUS
                                  ----------

                             MICROSOFT CORPORATION
                             163,130 Common Shares

                    ________________________________________

     This prospectus is part of a registration statement that covers 163,130
shares of our common stock issuable upon the exercise of options granted to
certain former directors and employees of Visio Corporation.  Visio Corporation
was merged with a wholly-owned subsidiary of Microsoft on January 7, 2000. We
will bear the costs relating to the registration of the common shares estimated
to be approximately $18,000.

     The common shares are traded on the Nasdaq Stock Market under the symbol
MSFT.  The average of the high and low prices of the common shares as reported
on the Nasdaq Stock Market on February 17, 2000 was $98.41 per common share.


     AN INVESTMENT IN OUR COMMON STOCK INVOLVES RISKS, PLEASE SEE "RISK FACTORS"
BEGINNING ON PAGE 3.

     Neither the Securities and Exchange Commission nor any state securities
commission has approved or disapproved these securities, or determined if this
prospectus is truthful or complete.  Any representation to the contrary is a
criminal offense.

                    ________________________________________

               The date of this prospectus is February __, 2000


                               TABLE OF CONTENTS


                                                                
THE COMPANY....................................................... 3
RISK FACTORS...................................................... 3
USE OF PROCEEDS................................................... 5
PLAN OF DISTRIBUTION.............................................. 5
OTHER EVENTS...................................................... 5
LEGAL MATTERS..................................................... 5
EXPERTS........................................................... 6
WHERE YOU CAN FIND MORE INFORMATION............................... 7


     You should rely only on the information contained or incorporated by
reference in this prospectus and in any accompanying prospectus supplement.  No
one has been authorized to provide you with different information.

     The common shares are not being offered in any jurisdiction where the offer
is not permitted.

     You should not assume that the information in this prospectus or any
prospectus supplement is accurate as of any date other than the date on the
front of the documents.

                                       2


                                  THE COMPANY

     Microsoft Corporation was founded as a partnership in 1975 and incorporated
in 1981. Microsoft develops, manufactures, licenses, sells, and supports a wide
range of software products, including:

     .    operating system software (for example, Microsoft Windows 98, Windows
          NT, and Windows CE) designed for personal computers, servers, handheld
          personal computers and other information devices;

     .    server applications software (for example, Microsoft Exchange Server
          and Microsoft SQL Server) designed for client/server environments;

     .    business and consumer applications software (for example, Microsoft
          Word; Microsoft Excel and Microsoft Outlook);

     .    software development tools; and

     .    Internet and intranet software and technologies.

     Microsoft's efforts also include:

     .    development of entertainment and information software programs;

     .    development of the MSN(TM) network of Internet products and services;

     .    alliances with companies involved with the creation and delivery of
          digital information;

     .    sales of personal computer devices such as the Microsoft Mouse and the
          Microsoft Natural Keyboard;

     .    publication of software-related books; and

     .    research and development of advanced technologies for future software
          products.

     Microsoft's business strategy is to develop a broad line of software
products for business and personal use, and to distribute these products through
diverse channels, including distributors, resellers, system integrators, retail
stores, and preinstalled on new computer hardware.

     Microsoft is organized as a Washington corporation with its principal
executive offices located at One Microsoft Way, Redmond, Washington 98052-6399.
Our telephone number is (425) 882-8080 and our electronic mail address is
msft@microsoft.com.

                                  RISK FACTORS

     While we are optimistic about our long-term prospects, the following risk
factors, among others, should be considered in evaluating any investment in our
common stock:

Technology changes rapidly in our business and we must keep up with such changes
in order to compete in the software industry.

     Rapid change, uncertainty due to new and emerging technologies, and fierce
competition have always characterized the PC software industry.  This pace of
change continues to accelerate today, including the advent of open source
software, new computing devices, new microprocessor architectures, the Internet,
and Web-based computing models.  We must continue to develop new and innovative
software solutions or future revenue may not duplicate historical growth rates.


Because the software industry is intensely competitive, we must keep pace with
companies who promote competing software platforms and technologies.

     While we work closely with OEMs and developers, other companies promote
their platforms and technologies against our products and existing industry
standards. These operating systems, platforms, and products may gain popularity
with customers, OEMs, and developers, reducing our future revenue.

                                       3



In order to maintain our leadership position in the software industry, we must
continue to pursue future initiatives.

     We continue to expand our efforts to provide and support mission-critical
systems to large enterprises.  In addition, we are developing a Windows-based
platform and a set of key services for our customers that build on that
platform.  The platform will combine Internet-hosted platform services with the
power of Windows-based PCs, servers, and non-PC devices.  Future revenue from
these initiatives may not duplicate historical revenue growth rates.

Since a substantial portion of our revenues are generated from sales of PC's, a
decline in PC growth rates would negatively impact our revenue growth rates.


     The underlying PC unit growth rate and percentage of new PCs acquired as
replacement units directly impact our software revenue growth.  Additionally,
inexpensive PCs and specialty devices create less demand for our software than
traditional PCs. The PC shipment growth rate may continue to decrease, the
replacement rate may continue to increase, and limited-use PC growth may
increase, reducing future software revenue opportunity.

Future product prices may decrease from historical levels, depending on
competitive market and cost factors.

     European and Asian software prices vary by country and are generally higher
than in the United States to cover localization costs and higher costs of
distribution. Increased global license agreements, European monetary
unification, tariffs, or other factors could erode such price uplifts in the
future and reduce future revenue opportunity.

Product upgrades and  potential market saturation may depress future revenue
growth.

     Product upgrades that enable users to upgrade from earlier versions of our
products or from competitors' products have lower prices and margins than new
products.  Also, penetration of our desktop applications into large
organizations is becoming saturated.  These factors are likely to depress future
desktop applications revenue growth.

Developing and localizing software is expensive, and the investment in product
development often involves a long payback cycle.

     We plan to continue significant investments in software research and
development, including online initiatives.  Significant revenue from these
product opportunities is not anticipated for a number of years.  Total spending
for R&D will increase over historical levels.

Since we do business globally, our business is significantly impacted by
international operations.

     Much of our operations are conducted outside of the United States, and a
large percentage of sales, costs of manufacturing, and marketing is transacted
in local currencies. As a result, our international results of operations are
subject to local economic environments and foreign exchange rate fluctuations.

Intellectual property rights are key intangible assets to our business and are
difficult to protect.

     We diligently defend our intellectual property rights, but unlicensed
copying of software represents a loss of revenue. While this adversely affects
U.S. revenue, revenue loss is even more significant outside of the United
States, particularly in countries where laws are less protective of intellectual
property rights. Throughout the world, we actively educate consumers on the
benefits of licensing genuine products and educate lawmakers on the advantages
of a business climate where intellectual property rights are protected. However,
continued efforts may not affect revenue positively.

Our business is often subject to various litigation actions including antitrust
proceedings with various governmental entities and other legal proceedings.

     Litigation regarding intellectual property rights, patents, and copyrights
occurs in the PC software industry.  In addition, there are government
regulation and investigation risks along with other general corporate legal
risks.  Finally, we are currently a party to various antitrust actions brought
by the U.S. government and various states, as well as a number of private
antitrust litigation claims.  While Microsoft believes that resolving these
claims will not have a material adverse impact on the Company's financial
position or its results of operations, an adverse final decision in these
actions could materially affect our operations and potentially cause the price
of our common stock to decline over the short term.

We may not be able to maintain our present revenue growth rate or operating
margins, and as a result, our operating results may suffer.

     For the fiscal year ending June 30, 1998 and 1999, our revenue growth rate
was 28% and 29% respectively. Our revenue growth rate in 2000 may not approach
the level attained in prior years. Operating expenses are expected to increase
from historical levels. Because of the fixed nature of a significant portion of
such expenses, coupled with the possibility of slower revenue growth, operating
margins may decrease from historical levels.

                                       4


                                USE OF PROCEEDS

     Upon the exercise of these options, we will receive the exercise price of
each option unless the options are exercised on a cashless basis. If all of the
options to purchase our common shares are exercised and the exercise price of
all options is paid, we will receive $3,801,506.28. We plan to use such proceeds
for general corporate purposes.

                             PLAN OF DISTRIBUTION

     Microsoft is offering the common shares covered by this prospectus to
individuals who are former employees and directors of Visio Corporation. The
common shares will be offered directly to such individuals on their exercise of
stock options. Since the issuance of the common shares will be direct to such
individuals, we will not utilize the services of an underwriter, broker or
dealer. We will impose no fees, commissions or other charges on the exercise of
a stock option.

                                  OTHER EVENTS

     Microsoft revenue and net income for the 30 days ended February 5, 2000
were $1.69 billion and $681 million. This information includes 30 days of
combined operations with Visio Corporation, which merged in a share for share
exchange with a wholly-owned subsidiary of Microsoft on January 7, 2000. Such
transaction has been accounted for as a pooling of interests. This information
is reported for purposes of complying with the Securities and Exchange
Commission's Accounting Series Release 135. In the opinion of management, this
information includes all adjustments (consisting only of normal recurring items)
necessary for its fair presentation. Interim results are not necessarily
indicative of the results of operations for Microsoft's third quarter or entire
year of fiscal 2000.

                                 LEGAL MATTERS

     For purposes of this offering, Preston Gates & Ellis LLP, Seattle,
Washington, is giving its opinion on the validity of the common shares. As of
the date of this prospectus, attorneys in Preston Gates & Ellis LLP who have
worked on substantive matters for Microsoft own fewer than 1,000,000 common
shares.

                                       5


                                    EXPERTS

     The consolidated financial statements of Microsoft for each of the three
years in the period ended June 30, 1999, incorporated by reference in this
Prospectus from Microsoft's Annual Report on Form 10-K, have been audited by
Deloitte & Touche LLP, independent public accountants, as stated in their report
which is incorporated herein by reference, and have been so incorporated in
reliance upon such report given upon the authority of said firm as experts in
accounting and auditing.

                                       6



                      WHERE YOU CAN FIND MORE INFORMATION

     .    Government Filings. We file annual, quarterly and special reports and
          other information with the Securities and Exchange Commission (the
          "SEC"). You may read and copy any document that we file at the SEC's
          public reference rooms in Washington, D.C., New York, New York, and
          Chicago, Illinois. Please call the SEC at 1-800-SEC-0330 for further
          information on the public reference rooms. Our SEC filings are also
          available to you free of charge at the SEC's web site at
          http://www.sec.gov. Most of our SEC filings are also available to you
          free of charge at our web site at http://www.microsoft.com/MSFT.

     .    Stock Market. The common shares are traded as "National Market
          Securities" on the Nasdaq National Market. Material filed by Microsoft
          can be inspected at the offices of the National Association of
          Securities Dealers, Inc., Reports Section, 1735 K Street, N.W.,
          Washington, D.C. 20006.

     .    Information Incorporated by Reference. The SEC allows us to
          "incorporate by reference" the information we file with them, which
          means that we can disclose important information to you by referring
          you to those documents. The information incorporated by reference is
          considered to be part of this prospectus, and information that we file
          later with the SEC will automatically update and supersede previously
          filed information, including information contained in this document.

          We incorporate by reference the documents listed below and any future
          filings we will make with the SEC under Sections 13(a), 13(c), 14 or
          15(d) of the Securities Exchange Act of 1934 until this offering has
          been completed:

          1.   Microsoft's Annual Report on Form 10-K, which includes various
               pages from its Annual Report to Shareholders, for the year ended
               June 30, 1999.

          2.   Microsoft's Quarterly Report on Form 10-Q for the quarter ended
               September 30, 1999.

          3.   Microsoft's Proxy Statement dated September 28, 1999.

          4.   The description of the common stock of Microsoft, which is
               contained in the registration statement of Microsoft filed on
               Form S-3, dated December 13, 1996.

          You may request free copies of these filings by writing or telephoning
          us at the following address:

                    Investor Relations Department
                    Microsoft Corporation
                    One Microsoft Way
                    Redmond, Washington 98052-6399
                    (425) 882-8080
                    email: msft@microsoft.com


     You may also review and/or download free copies of items 1, 2 and 3 at our
     web site at http://www.microsoft.com/MSFT.

                                       7



                                    PART II

                    INFORMATION NOT REQUIRED IN PROSPECTUS

Item 14.  Other Expenses of Issuance and Distribution.
- ------------------------------------------------------

     The expenses relating to the registration of Shares will be borne by the
registrant.  Such expenses are estimated to be as follows:


                                                             
     Registration Fee --
       Securities and Exchange Commission                       $ 4,727.87
     Accountants' Fees                                          $ 5,000.00
     Legal Fees                                                 $ 7,500.00
     Miscellaneous                                              $ 1,000.00
                                                                ----------
             Total                                              $18,227.87


Item 15.  Indemnification of Directors and Officers.
- ---------------------------------------------------

     Article  XII of the Restated Articles of Incorporation of Microsoft
authorizes Microsoft to indemnify any present or former director or officer to
the fullest extent not prohibited by the WBCA, public policy or other applicable
law.  Chapter 23B.8.510 and .570 of the WBCA authorizes a corporation to
indemnify its directors, officers, employees, or agents in terms sufficiently
broad to permit such indemnification under certain circumstances for liabilities
(including provisions permitting advances for expenses incurred) arising under
the 1933 Act.

     The directors and officers of Microsoft are entitled to indemnification by
each of the selling shareholders against any cause of action, loss, claim,
damage, or liability to the extent it arises out of or is based upon the failure
of any selling shareholder (or his donees, legatees, or pledgees) and each
underwriter to comply with the Prospectus delivery requirements under the
federal securities laws or any applicable state securities laws or upon any
untrue statement or alleged untrue statement or omission or alleged omission
made in this Registration Statement and the Prospectus contained herein, as the
same shall be amended or supplemented, made in reliance upon or in conformity
with written information furnished to Microsoft by such selling shareholder or
such underwriter.

     In addition, Microsoft maintains directors' and officers' liability
insurance under which Microsoft's directors and officers are insured against
loss (as defined in the policy) as a result of claims brought against them for
their wrongful acts in such capacities.

Item 16.  List of Exhibits.
- --------------------------

     The Exhibits to this registration statement are listed in the Index to
Exhibits on page  II-4.

Item 17.  Undertakings.
- ----------------------

     The undersigned registrant hereby undertakes:

     (1) To file, during any period in which offers or sales are being made, a
post-effective amendment to this registration statement:

         (i) To include any prospectus required by section 10(a)(3) of the 1933
     Act;

                                      II-1


           (ii)  To reflect in the prospectus any facts or events arising after
     the effective date of this registration statement (or the most recent post-
     effective amendment thereof) which, individually or in the aggregate,
     represent a fundamental change in the information set forth in this
     registration statement.  Notwithstanding the foregoing, any increase or
     decrease in volume of securities offered (if the total dollar value of
     securities offered would not exceed that which was registered) and any
     deviation from the low or high end of the estimated maximum offering range
     may be reflected in the form of prospectus filed with the Commission
     pursuant to Rule 424(b) if, in the aggregate, the changes in volume and
     price represent no more than a 20% change in the maximum aggregate offering
     price set forth in the "Calculation of Registration Fee" table in the
     effective registration statement;

           (iii) To include any material information with respect to the plan
     of distribution not previously disclosed in this registration statement or
     any material change to such information in this registration statement;

provided, however, that paragraphs (1)(i) and (1)(ii) do not apply if the
information required to be included in a post-effective amendment by those
paragraphs is contained in periodic reports filed by Microsoft pursuant to
Section 13 or Section 15(d) of the Exchange Act that are incorporated by
reference in this registration statement.

     (2)   That, for the purpose of determining any liability under the 1933
Act, each such post-effective amendment shall be deemed to be a new registration
statement relating to the securities offered therein, and the offering of such
securities at that time shall be deemed to be the initial bona fide offering
thereof.

     (3)   To remove from registration by means of a post-effective amendment
any of the securities being registered which remain unsold at the termination of
the offering.

     (4)   For purposes of determining any liability under the 1933 Act, each
filing of the registrant's annual report pursuant to Section 13(a) or Section
15(d) of the Exchange Act (and, where applicable, each filing of an employee
benefit plan's annual report pursuant to Section 15(d) of the Exchange Act) that
is incorporated by reference in the registration statement shall be deemed to be
a new registration statement relating to the securities offered therein, and the
offering of such securities at that time shall be deemed to be the initial bona
fide offering thereof.

     (5)   Insofar as indemnification for liabilities arising under the
Securities Act of 1933 may be permitted to directors, officers and controlling
persons of the registrant pursuant to the foregoing provisions, or otherwise,
the registrant has been advised that in the opinion of the Securities and
Exchange Commission such indemnification is against public policy as expressed
in the 1933 Act and is, therefore, unenforceable. In the event that a claim for
indemnification against such liabilities (other than the payment by the
registrant of expenses incurred or paid by a director, officer or controlling
person of the registrant in the successful defense of any action, suit or
proceeding) is asserted by such director, officer or controlling person in
connection with the securities being registered, the registrant will, unless in
the opinion of its counsel the matter has been settled by controlling precedent,
submit to a court of appropriate jurisdiction the question whether such
indemnification by it is against public policy as expressed in the Act and will
be governed by the final adjudication of such issue.

                 [Remainder of Page Intentionally Left Blank]

                                      II-2


                                  SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, the registrant
certifies that it has reasonable grounds to believe that it meets all of the
requirements for filing on Form S-3 and has duly caused this Amendment No. 2 to
registration statement to be signed on its behalf by the undersigned, thereunto
duly authorized, in the City of Redmond, State of Washington on February 18,
2000.

                                    MICROSOFT CORPORATION

                                    /s/ William H. Gates III
                                    ------------------------------------
                                    William H. Gates III
                                    Chairman and Chief Software Architect


     Pursuant to the requirements of the Securities Act of 1933, this
registration statement has been signed by the following persons on February 18,
2000 in the capacities indicated.


                           
/s/ Steven A. Ballmer         President, Chief Executive Officer
- ---------------------------   and Director (Principal Executive Officer)
Steven A. Ballmer

/s/ William H. Gates III      Chairman of the Board of Directors
- ---------------------------
William H. Gates III

         *                    Senior Vice President, Finance and
- ---------------------------   Administration; Chief Financial Officer
John Connors                  (Principal Financial and Accounting Officer)

         *                    Director
- ---------------------------
Paul G. Allen

         *                    Director
- ---------------------------
Richard A. Hackborn

         *                    Director
- ---------------------------
David F. Marquardt

         *                    Director
- ---------------------------
William G. Reed, Jr.

         *                    Director
- ---------------------------
Jon A. Shirley


* Pursuant to power of attorney dated January 11, 2000.

                                      II-3


                               INDEX TO EXHIBITS



Exhibit No.                Description                        Location
- -----------                -----------                        --------
                                                        
5              Opinion of Counsel re: legality                Previously filed.

10.1           Visio Corporation 1990 Stock Option
               Plan, as amended                               a

10.2           Visio Corporation 1995 Long-Term
               Incentive Stock Option Plan, as amended        b

10.3           Visio Corporation 1995 Stock Option Plan
               for Nonemployee Directors, as amended          c

23.1           Consent of Deloitte & Touche LLP as
               Independent Auditors                           See attached.

23.2           Consent of Preston Gates & Ellis LLP           Previously filed.

24             Power of Attorney                              Previously filed.


- --------------------

a    Incorporated by reference to Exhibit 10.1 to the Annual Report on Form
     10-K of Visio Corporation for the fiscal year ended September 30, 1997.

b    Incorporated by reference to Exhibit 99.1 to Visio Corporation's Post-
     Effective Amendment No. 1 to the Registration Statement on Form S-8
     (Registration No. 333-50619), effective June 18, 1998.

c    Incorporated by reference to Exhibit 10.1 to Visio Corporation's Quarterly
     Report on Form 10-Q for the quarterly period ended June 30, 1999.

                                      II-4