I have a ASUS X55U laptop PC ,originally it had windows 8 running on it( factory installed). I never did like windows 8 and my PC was beginning to get very laggy, so I decided to upgrade to windows 10. The download went fine but when i tried to install it, all I get is a screen saying "checking for updates" with the usual spinning lottery balls and nothing happens. Ive tried rebooting several times , I even let it run overnite ( thats 8 hours) it shouldn't take that long for an update. And whats stranger is that i can no longer access the bios using F2. I had windows 10 stored on a USB thumb drive, i changed the boot order to point to the usb , rebooted my PC and windows began loading. Everything ran fine up to that point, but when it got to auto update it just keeps running perpetually. Whats happening here ?