Hello, I have such trouble, please help me. I installed windows 8.1 x86 at my work PC on friday successfully, i activate it by windows toolkit. it was working fine. today i was on Facebook and also was downloading a windows 8.1 iso from here when everything freezed , no mouse no keyboard was available. no reactions. i wait a 30 minutes like that after i restart manualy it. after manufacturer title appeared such error: no such partition. Grub rescue. I check also BIOS. what happend? can you help me? please explain what can have to do such situation? thanks in advanced.