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Message: <blockquote data-quote="geekboy2000" data-source="post: 773275" data-attributes="member: 15055">Lately (and becoming more frequent), my iMac will suddenly just lock solid, and require a hard reboot to recover.  I've reviewed the console logs, and thought that I had removed a few potential offenders (HP Trap Monitor among them), yet the problem persists. If this even gets written to a log, which log or logs would I look at, and if I capture log data, what might I be looking for?FWIW, it seems that most, if not every time, this occurs during actual use. It can sit idle forever w/screensaver running, open apps, etc.  But, a mouse move, scroll down a web page, etc, will usually trigger it (might be coincidence). Sometimes I'll notice video distortion at the instant of the hang as well.  I just applied the 10.5.6 update, but it had been occuring prior to that as well.  Thanks!</blockquote>