NEW YORK - NOVEMBER 30:  (NO SALES, NO ARCHIVE) In this handout photo provided by Microsoft, Microsoft Corp. Chief Executive Officer Steve Ballmer speaks about  the business availability of the Windows Vista operating system, the 2007 Microsoft¨ Office system and Exchange Server 2007 at a press conference at the Nasdaq Market November 30, 2006 in New York City. This is the first simultaneous release of Microsoft's flagship products since the joint launch of Windows 95 and Office 95 more than a decade ago. The year 2006 also marks the 20th anniversary of Microsoft since its listing day on March 13, 1986. Getty Images logo Getty Images 31 months ago

NEW YORK - NOVEMBER 30: (NO SALES, NO ARCHIVE) In this handout photo provided by Microsoft, Microsoft Corp. Chief Executive Officer Steve Ballmer speaks about the business availability of the Windows Vista operating system, the 2007 Microsoft¨ Office system and Exchange Server 2007 at a press conference at the Nasdaq Market November 30, 2006 in New York City. This is the first simultaneous release of Microsoft's flagship products since the joint launch of Windows 95 and Office 95 more than a decade ago. The year 2006 also marks the 20th anniversary of Microsoft since its listing day on March 13, 1986.