Whenever I leave my PC for more than 24 hours I'll receive a standard Windows ERROR that asks me to send the problem to Microsoft. A few times a "Dr Watson" msg popped up afterwards. Just now when it happened, I decided not to reboot - but instead I checked the system resources & my explorer was using aprox 80% of the CPU and about 180,000 KB in memory. I've scanned with Spy Sweeper & Avast Anti-Virus, found nothing but the few common spyware which are listed as low-risk. Is there anything else I can use to diagnose the problem?