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Message: <blockquote data-quote="Kid Charlemagne" data-source="post: 3567708" data-attributes="member: 93">I'm having an issue with my computer - its getting up there in age, so I may need to replace it in any case - and I was hoping that the collective wisdom (well, collective knowledge, at least) of ENWorld could help.For the last couple of days, when I boot up my home PC, it will run for a while and then freeze.  Not BSOD, but the image on my monitor will freeze, and the PC becomes totally unresponsive (I don't think it is continuing to run normally with a frozen image on the monitor, but I can't rule it out).  This started when I was playing a new video game (Prey) so I thought it was an issue with the game, but it is continuing to happen now even when I'm not playing it.  Generally, the time between bootup and freeze has been decreasing, but increases somewhat if I let the PC sit for a while.  I've had it freeze as early as the Windows start up screen.  Right now, it happens quickly enough that I can't really work with the PC at all (I'm on my work PC right now).Any thoughts?  I've replaced the power supply, heat sink, fan, and graphics card over the last year, but nothing within the past three months or so.  Prey is the only new program I've installed recently.  I can't get the thing to run long enough to do any kind of scan or virus check, but I'm generally pretty good and diligent about viruses and such.</blockquote>