My Windows 7 crashes every time I turn on my computer on the black screen that says "starting Windows" and crashes half way through the sequence where the little balls make the Windows logo. It was working fine until I shut it down and rebooted it. System restores aren't working and I cannot get into the safemode cmd prompt. I feel like it's the drivers that are crashing it because when I started up the cmd in safe mode the last thing to pop up was \windows\system32\drivers\aswRvrt.sys before a quick blue screen came up and it restarted. Startup repair finds nothing wrong and neither does Windows memory diagnostics. Need help ASAP PLEASE