HELP NEEDED!! PLEASE HELP

just a couple of days ago i was playing cs like regular but i desided to uninstall some downloading programs…i uninstalled and leaved the computer on for i a few hours wile i was away training…but when i got back and was about to play cs it says “The selected OpenGL mode isn´t supported by your video card” and i don´t know what i could be…could it be something those uninstalled programs uninstalled that shouldn´t be uninstalled? And the graphic card has changed name. what could effect that? In witch folder does OpenGL excist? Can anyone help me please…

MUUUHHHAHAHAHAHAHAAA!!!
Cheating n00b!