My laptop was left on for a few hours. A MSI Leopard 8RE. I've left it on a few times over the year. But when I came back to it after being out it was suddenly in BIOS. I left it while being in windows, what could cause it to randomly enter bios?
As stated before, there are any number of reasons. Glad it started up fine. I suggest not leaving it on anywhere someone can (or something/aka pet) can get to it. Also, virus checks don't check for malware, you would have to do that separately. Unless you have the more expensive software that does both. There are a lot of free ones though.