i dunno, thats weird.
go to www.steampowered.com (if thats what its still called) and go to their faq page.
I used to play this game all the time, and trust me it takes a while to get good at this game. A good tip is to try and know how to navigate and exploit maps properly because it does come in really helpful on some maps like dust and dust2 as you need to prevent bomb planting, vice versa. This will only come into affect after you've played the map plenty of times so you know what to do & where to go hence it takes times. Also always have a quick switch between your primary gun and your secondary gun because when you run out of your ammo its easier to quickly get your other gun out then having to scroll through your arsenal, which helps especially for newbies.
When you die, always watch good players, learn from the best.
i got the counterstike 1 anthology pack for chrismass yeah!! i thought then i installed it and steam poped up so i installed all of that then went to the my games part double clicked on em and it said i had to buy them that was strange i thought but then i found a part were i type in the cd-key after that is said that some one already had that key (i tryed this 3-4 times) what do i do now i wanna play some fockin counterstrike!!!!