Microsoft released a statement saying that the only way to protect against this, if you're running XP, is to upgrade to Win7 or Win8.
I'm shocked. Shocked!
Of course, they -are- correct, that's a true statement.
Unless you're a big corporation paying extortion money to Microsoft for continued XP update support (yes, it exists if you have enough money).
I think I read that Embedded XP support will continue for a while yet.