I have an OEM install, meaning I have no disc. I installed SlimDrivers to run some driver updates, one in particular for a USB port failed. I went to restart my computer, after 30 minutes it was still hanging at the shutdown screen so I turned it off by the power switch. When I try to boot up my computer now, I get nothing but the Windows logo. I've waited up to 6 hours and it will not progress past this screen. I'm on an x64 system.