That's it, Windows XP is dead: it's not supported by Microsoft any more ! !
As annonced in a previous article, Microsoft has decided to stop Windows XP support: a way to push the migration to more recent OS.
However a few companies have decided to carry on Windows XP and to pay a special support from Microsoft for a high price. The Chinsese will have a support performed by chinese comapnies.
That's the moment to switch to Linux (Ubuntu or others) and to get rid of Windows.
More information on an article from French ZD Net.