Desktop Windows Manager consuming high CPU on Windows 8

I don’t know what caused it, but my video on Windows 8 became slow and jerky. Videos would not play. Desktop Windows Manager was consuming 20 to 25 percent of CPU (an entire core, I have a quad core machine). I killed Aero and rebooted my machine. Nothing worked. I have a dual monitor setup. When I uninstalled the video driver I lost the second monitor, but the video was normal again. I re installed the video driver and so far its working.