Hello Judas (and all other people still using XP),
Given that Microsoft is abandoning XP starting next year, it really is time to move to a newer version of Windows.
If you continue to use XP, not only are you making yourself very vulnerable, you are also going to be a threat to other people as well. As of next year, Microsoft will not bring out any security patches for XP any longer, basically making your computer a hackers playground, enabling them to abuse your computer for e.g., spam sending, but also for hijacking your personal data etc.
I would therefore really urge you to upgrade ASAP. The sooner the better, but at least before the end of the year! For your own sake as well as others.
Thanks,
Hayo
PS. It is a pity that Microsoft abandons XP (though after so many years I can't blame them) as for me it still is their best OS version. Windows 7 is good too though, and probably your best option for upgrade. Vista is quite bad, and I don't think you'll enjoy Windows 8 much in its current form (hopefully Windows 8.1 will be better)