Micorsoft announced that XP will continue to live on until somewhere in 2011.

"Windows 7 Professional and Ultimate customers will have the option to downgrade to Windows XP Professional from PCs that ship within 18 months following the general availability of Windows 7 or until the release of a Windows 7 service pack, whichever is sooner, and if a service pack is developed," a company spokeswoman said in an e-mail.