My BIOS is ¨P01-A0 and the update is named R01-B1, does it matter....? I mean, my pc is 2 years old,I bought in 2010. They might have changed the BIOs since then...Can you please tell me the signification of these P01-A0 and etc ? EDIT: I believe my BIOS is not the same since their "updates" are older (they were last modified in 23/5/2009) than my BIOS's (dates from 08/08/2009). I also tried disabling my devices in device manager but with no success. By devices I mean; Realtek on-board soundcard, USB Razer DeadthAdder Mouse, USB HP Multimedia Keyboard, Nvidia GeForceGTX 260 (GPU), DVD read-writting hardware. I tried re-updating to the lastest drivers but changed nothing.