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OK guys, update: I have updated all drivers but the PC shuts still down, albeit only about once a day, which is a lot better than before...

Lots of errors (event ID 10005). DCOM got error "1084" attempting to start the service BITS with arguments "Unavailable" in order to run...

I don't remember that, sorry. I'll run it in safe mode over night again and report back tomorrow morning. I found this link...

I had the system running in safe mode for about 24 hours without a problem, if that's what you mean.

This PC drives me nuts! It ran for over 2 days without shutting down and I got my hopes up. Today it started back with its antics. What...

If I only knew how!

I just checked, the event viewer works in safe mode but my screen capture software does not, so no screen shot. But it shows the same...

OK, sorry, my bad. The event viewer was checked when the PC was in win 11 mode. I didn't know that it would work in safe mode. I'll try...

Well, there was the black screen and "Safe Mode" in all 4 corners. If that isn't safe mode, then I don't know what is.

Here's a screen shot

There are lots of Errors 1084, event IDs 10005 during the safe mode period.

Guys, the PC has been running in safe mode for close to 24 hours and it never did shut off! As soon as I started the win 11 mode again...

bobkn - I'm not saying that chkdsk shuts the PC down, it's the "regular" shutdown the PC has been doing for months. It just happens...

Well, I tried to run those tests. The sfc test comes back fine after the 1st round found some irregularities. The chkdsk test does not...

Sorry, sent the wrong screenshot. Here's the correct one: