my brother was a moron, he told me he couldnt install it casue the cdkey was invalid, turns out he didnt just put in the key but some other numbers and letter below the cdkey. hopefully this is your problem
i gotta re-install cs:s cause it sscrewed up witht he last install. i usualy play on a few, one that i can remember off of the top of my head is
GGKthx servers etc..
I work in a bookstore and i had some free money to throw away and realized i wanted to learn some php as its in my course outline for this year. I bought it and it has some great examples and perfect for a noob, so i reccomend it.