Cant Alt-tab out!

When im in combat arms if i get out of the screen i cant get back in. im not really sure what happens but if i get out and try to click back into combat arms it looks like its loading back into combat arms but it isnt. can someone tell me whats wrong?

i got windows xp if that helps and i got a good cpu so dont say its just a bad cpu

CPU specs? For all we know your definition of good could be way different.

Ram
Processor
Video Card

Btw, it could be cause your on windows XP

nm it worked idk what happened

I can't alt tab either. Never could. On this laptop anyway.