Microsoft Ending Support for Windows XP and Office 2003 Source: U.S. Computer Emergency Readiness Team (US-CERT)
Computers operating Windows XP with SP3 or running Office 2003 products will continue to work after support ends. However, using unsupported software may increase the risk of viruses and other security threats.
Users have the option to upgrade to a currently supported operating system or office productivity suite. The Microsoft “End of Support” pages for Windows XP and Office 2003 offer additional details.
There are software vendors and service providers in the marketplace who offer assistance in migrating from Windows XP or Office 2003 to a currently supported operating system or office productivity suite. US-CERT does not endorse or support any particular product or vendor.
Users who choose to continue using Windows XP after the end of support may mitigate some risks by using a web browser other than Internet Explorer. The Windows XP versions of some alternative browsers will continue to recieve support temporarily. Users should consult the support pages of their chosen alternative browser for more details.