I do not know if some other people have reported or noticed it but I have been noticing a strange problem in win 8.1. This is not a problem in win 8 and since I have 2 system images of win 8 and 8.1, I can confirm that this problem is only in 8.1 When win 8.1 wants to restart (installing programs or whatever reason), sometimes the system just boots down and does not come back on (ie I do not see the BIOS). In that situation, I have to press the reset button on the cabinet and that solves the problem. I get the BIOS and the system loads up. I am sure that this should not cause any problems in hard disks since the system had remained powered off. This is not a problem all the time but at least around 25-40% of the time when I restart. This is not a problem in 8, at least on my system.