Print Screen

Hi! We recently updated our computer and got Windows XP and PS CS. My problem is that I can't seem to be able to take screencaps using the print screen button. I was able to, before. Is it related to WXP, PSCS or something else? Is there an other way to take a picture of my computer screen to use with PS?
Thanks in advance.

[Edit: Nevermind, evrything's fine now.]