
Microsoft extended Windows XP downgrade until 2020 which means until the end of Windows 7 lifecycle. Previously company said that users will be eligible for Windows XP downgrade 18 months after the debut of Windows 7, or until Windows 7 SP1 become available.
Microsoft also said that retailers can sell Windows Vista boxed version until October 22, 2010, and OEMs will be able to sell PCs with pre-installed Windows Vista until October 22, 2011.