every time i get off css an error called hl2 pops up...i can play css but after a while the error slows down my computer and i have to clean my computer out how do i stop this? thanks.

Updating all drivers can help this out a lot, Getting a full Driver Updater can make it easy and fast.

I have Driver Genius Pro, works great.

Get it here: http://thepiratebay.org/torrent/5503248/Driver_Genius_Pro_2009_v9.0.0.189___Serial-%5BHB%5D
Follow the README instructions / file description for install instructions.

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Cpt Snow {Reveille}