I updated the bios on my motherboard earlier in the hopes of installing a AM3+ cpu, now when i turn on my computer windows won't start. The bios and post work. and i can play on the bios as much as i want, but after exiting the bios i only get a black screen with a blinking white underscore in the top left corner, I also have an oem version of windows which I'm not sure if I can re-install? advice please? (I'm using an asus crosshair V formula motherboard)