Hi, thanks for the fast reply. I read somewhere I needed to enable Kernel memory dumps; I have switched that back to Small memory dumps. I then restarted and attempted to locate the Minidump folder you requested, but it's not there. Meanwhile, the system has restarted unexpectedly twice before I got this posted...no blue screen either time (just flashed black then COMPAQ logo appeared), I'm not sure what the error codes were. I'm starting to suspect it is a power source issue. I will keep an eye out for the Minidump folder and if it appears I will post back. Thanks again.