PC randomly restarts

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@phillpower2 @Bruce

I'd be stripping it down firstly, that'll allow inspection and cleaning of all parts.
reassemble everything on a piece of cardboard on the table or floor and start it up.
if the same issue occurs, I'd then be looking at backing up all my data and loading a fresh copy of Win10.
you could try a repair install of Win10 (keeping your programs and data) but at 5 years old, it wouldn't hurt nuking it from orbit and starting afresh with everything.

then, from the clean slate state, run the rig without any additional software for a few days and see if the issue occurs.
if not, add one program at a time and test it out again.
during all that, if it's hardware, it'll show itself - like failing hard drive.
or if it's software, you'll know it the last program installed when it starts crashing again.

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