I did, many times. and deleted all the registry keys and everything. WHat it finnally took was to get a new opengl.dll from my brother on his computer, luckily we have the same drivers so it worked but BE WARNED..
***SOme of the wallhacks/aimbots that just go in Your counterstrike folder CAN and WILL change system files for CS so removing wallhacks and stuff means getting new versions of these crucial computer unique files.. i.e.. Opengl.dll
Good luck to all who also have this problem..