>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.