please help! not booting up after 265.90 driver

M11x R2 i7 4gb ram 320gb

So yesterday i had the 265.90 driver and everything was fine except ARMA 2 did not run. So I downgraded to the 260.89 BETA driver that I had before (running driversweeper after uninstall and performing nvidia clean install)

Today I wanted to play BC2 which as we all know requires the 265.90 driver to get around punkbuster and optimus. Well after installing the driver (again using driversweeper and nvidia clean install) youtube wasnt working.... no sound from the video and very choppy framerates. So installed latest flashplayer to no success.

Rebooted computer and now will NOT boot up. after alienhead goes to "windows error recovery"

"windows failed to start. A recent hardware or software change might be the cause. If windows files have been damaged or configured incorrectly, Startup repair can help diagnose and fix the problem. If power was interrupted during startup, choose start windows normally"

launch startup repair or start windows normally

startup repair does nothing (waited more than an hour)

when i start normally it bsods but too fast i cant read it.
when i start in safe mode the last thing it loads is classpnp.sys and then crashes


I tried using AVG rescue on a usb key to rename nvidia folder in program files but nothing...

thanks for any help I'm really stuck.