i have win xp and a geforce 2 when i start my computer it loads fone and all but when i play vertain games (hl) it goes normal till i quit the game then the gamma drops if i try to reset the gamme and go into game it does nothing its dark as hell have tryed to adjust all sliders and do everything i have found on the forum nothing works i have reinstalled xp and every thing my brightness s maxed on my moniter its quit frustrating when you want to play cs and yer moniters to dark so you have to reset yer com 
welp got to go reset now cause i want to play plz someone help me