Some odd problems started on my PC a few weeks ago. Malwarebytes was set to scan at 2:55 each morning. On Monday & Tuesday's when I would get on the computer, it would be frozen. LED's on, fans spinning but the computer wouldn't respond. A restart got it going again. In the Reliability History it showed a hardware error around the time the Malwarebytes scan was set to start. This only happened Monday and Tuesdays, all the other days no problems.
There was also occasional internet disconnects when I'd get on the PC in the morning. It showed I was still connected but no browser would open and any app would say I was offline.
I changed the scan time to 12:20 AM and it just did the scan and the PC didn't freeze. However, the net again would not connect. Opening a browser I would just get "trying to resolve host". No error in Event Viewer or reliability history. Again restarting fixed the issue.
Don't really understand why these issues would only happen on a couple of days, but not others.