>>Microsoft has announced that all support for Windows XP will end April 8.
>>
>>http://windows.microsoft.com/en-us/windows/end-support-help
>>
>>http://www.computerweekly.com/news/2240181208/What-to-do-next-Windows-XP-end-of-support
>
>I have some pretty frugal clients, but I don't know of any that are still running Windows XP.
>MS stopped supporting XP in its new .NET frameworks a long time ago so this is not a surprising announcement.
>That said, the old .NET frameworks are still available and will run on XP.

See the first graph on the right.

http://en.wikipedia.org/wiki/Usage_share_of_operating_systems