I'm having the same problem. Seems my system used to shut down (partially, leaving lights on) after about an hour. After having switched the power supply yesterday, I found it stayed up for almost 8 hours before shutting down. I was sure I had the problem solved. Now I've stayed up for about 6 hours in Safe Mode. I don't know how much longer that will last, but it's still better than the 45 minutes to an hour I was getting before. Yikes. There are a few other posts about this issue on this site.
Moderator note: Moved from this thread: https://www.techspot.com/community/topics/pc-randomly-shuts-down.205590/#post-1455129
Moderator note: Moved from this thread: https://www.techspot.com/community/topics/pc-randomly-shuts-down.205590/#post-1455129
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