A couple of times during the last few months, my PC screen freezes and then the sound is stuck in a sort of loop. It stays frozen for a few more seconds and then goes straight to a BSOD that gives the error, ''BAD_POOL_CALLER''. Nothing in my system is overclocked and it's only about 2 and a half years old. I really hope this doesn't mean I need to replace anything. Please help me