at the start of the week our city had a big power outage due to sudden frost. The outage took around 24 hours and few times the power just flashed so the PC restarded and died immediately.
Ever since then the clock keeps getting wrong and I have to manually update the time only for it to go wrong again. In all those years I used computers, I never really had this problem so I am kind of clueless how to solve it now. Of course I have internet synchronization checked, so I don't know why it keeps going off.