When you power the system down, unplug it from the wall for ~10 minutes, plug it back in, then power it back up, is the BIOS clock off by an hour again? If so, I’d follow the recommendation to replace the CMOS battery. If you look your motherboard up online, you should be able to find the location on the board and type of battery. It isn’t a complicated task, but it can seem difficult if you’ve never done it before.
When you power the system down, unplug it from the wall for ~10 minutes, plug it back in, then power it back up, is the BIOS clock off by an hour again? If so, I’d follow the recommendation to replace the CMOS battery. If you look your motherboard up online, you should be able to find the location on the board and type of battery. It isn’t a complicated task, but it can seem difficult if you’ve never done it before.