As announced in 2008, support for Windows XP Service Pack 2 (SP2) will end on July 13, 2010. Support for Windows 2000 will end on the same date. Support for Windows Vista Release to Manufacturing (RTM) will end on April 13, 2010.

Updating your Windows XP, Windows Vista and Windows 2000 PCs before the end of mainstream support dates will ensure your PCs stay supported and receive security updates. The best way to be secure and supported is by migrating to Windows 7.

• Small and midsize businesses should migrate to Windows 7 Professional, which is designed to help you work the way you want, help you get more done, and safeguard your work.

• Larger organizations should migrate to Windows 7 Enterprise, which enables enterprise users to be more productive from anywhere, manage risk through enhanced security and control, and reduce costs through streamlined PC management.

Click here for more details from Microsoft.