I decided to try windows 8 again after having tried twice before and giving up due to instability. I have an upgrade edition which is on a USB drive. After 2 unsuccessful install attempts, I finally got it installed. But now, when i try to log on, it accepts my password and then i am greeted by a black screen, nothing on there but i can use my mouse but there is nothing to click. I want to try a fresh install, before i give up completely. Is there any way i can change the USB to boot to be able to do a fresh windows 8 install?