Hi. New user, new system, new problem. Ok, here goes... at random times, at random activities my machine freezes/ locks up: - no keyboard response (incl. NumLock) - no mouse response - looping audio - manual reset works - no trace of foul play in the Event viewer. It's a new system (just 2 months); did a clean Wininstall about a month ago, all drivers are up-to-date. <---- specs. I'm posting this to "Software" section because i just had the hardware checked out about the same problem (they replaced CPU, but i don't know if they did it just in case or found some flaw there). The threads with similar issues i have found all described the lockups at heavy-duty activities but mine happen at "slow" or idle moments too (such as in the middle of typing a message). My question is: What should i check / where should i look?