For a couple of days now I have had an issue where my PC would start, the light on the power button would turn on and then everything would seemingly shut down after a second or two. Then, my PC would turn back on and instead of booting normally it would give me an 'American Megatrends' screen which would tell me that I needed to run setup. Upon going into the BIOS, my settings would all be reset. I'd change them, then quit the BIOS and boot up as normal.
Apart from this, I have noticed that the time Windows displays seems to be affected and I have to sync it, though the PC otherwise functions normally. I opened up my case yesterday and nothing seemed to be loose or out of place on the motherboard.