April 13, 2010: Windows Vista without any service packs installed will have it’s support lifecycle ended. No more security updates. (Rather quick imho)
July 13, 2010: Windows XP SP2 and every version of Windows 2000 will have it’s support lifecycle ended.
Windows Server 2003 will go into the Extended Support Phase (security updates are free, but the rest of the support must be paid for).
