[ubuntu] need help with problem (dont know what to classify it as)

view full story

http://ubuntuforums.org – ok, so earlier this morning my linux laptop crashes on me, i reboot it and it says the video card drivers have malfunctioned and need to be reinstalled, and it gives me the option to boot into lower graphics, i do so and then go to sleep as i had work later on that day, i get home from work and set about fixing the problem, i reinstall the nvidia drivers, and then reboot, but now, none of the windows have their outer bar, so i cant click and drag them around my desktop, also hotkeys like alt+tab and alt+f4 dont work, i thought it would be a window manager problem so i installed the kde-window- (Hardware)