When I start 1.6 (steam) I get 100 fps no trouble at the start but when I open a window such as servers is lags heaps like 20-30 fps drop. In game I usually keep a steady 100 but when I get into water at aztec it lags aswell even when opposed with a few people at A long(dust2)

Sounds like a game-engine issue. Your hardware should run 1.6 higher that 100 FPS (I get about 200), so perhaps check-out the Steam forums or FAQ's

Good Luck!

-AlanOne

Update your drivers. Video card, sound etc. Post back results.

Counterstrike 1.6 relies mainly on CPU, not graphics power. So your cpu will probably have much more bearing than your graphics

Ok i've updated all the options that's in device manager, most of which said that they had drivers that were up to date, if there's a program that can give me the most up to date for all my hardware/software that's better than device manager plz tell me. Now after i've done all of that I occasionally get the 100 at the start and most times I get a this weird fluctuation between 93-94