Introducing Windows Vista Business edition
See the first edition of Windows designed specifically for the needs of small businesses.
Power your small business
Visit the Windows XP how-to center
Get downloads for Windows XP
5 ways to speed up your computer
Internet Explorer 7
Windows Media Player 11
Windows Live OneCare
Windows XP SP2
Photo Story 3
Windows Defender
DirectX 9.0c
PowerToys
More...
Get expert tips from
users like you
Take advantage of tips, free downloads, and friendly experts who can answer your questions and make your time at the computer safer, easier, and more fun.
Tips for a trouble-free SP2 upgrade
Features and benefits
Tours and demos
Upgrade Center
How-to Center
Windows XP Professional Edition EULA
Get our newsletter
Get the latest security updates
Download security updates for Windows, Office, Internet Explorer, and OneCare.
Download Windows Defender
Scan and clean your PC to remove malicious software
Microsoft Update
Office Update
