very weird in-game freeze and resume

hello i have a problem when i playing a games (every games) 15-20 minutes later my entire desktop is sudden freeze i can hear the background sound i can't even use ALT+TAB but when i press CTRL+ALT+Del and press Cancel everything went back to normal now if i continue bypassing that freezing state my game crashed (sometimes BSOD) to desktop also color glitches everywhere , any idea the cause of this problem?

Sounds like your Graphic driver is crashing and gets repaired by W7. If you actually have BSOD's, ask a mod to move this to Crashes and Debugging. we'll help you there, specially if you follow the instructions on posting dumps....
Good luck!