Thanks for the ideas. I've been monitoring it and I don't think anything's
overheating, and my voltages seem pretty constant, but it just happened again
when I awoke my computer after I got home from work this evening :(

(Sorry for the delayed reply by the way - had a busy couple of weeks!)

If anyone has any other ideas please let me know! Thanks,

Paul

"Steve Thackery" wrote:
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> You know, this sounds like a subtle hardware problem. I wonder if something
> might be overheating, or one of the power lines is sagging.
>
> Not much help, I know - but it might suggest a new area to explore.
>
> SteveT
>
>[/color]