I seem to be having a lot of problems when I play CS:S. When I start the game it works fine, but when I go into a server, it usually lasts 30 seconds to 2 minutes, then an message pops saying h2l.exe has closed due to an unexpected error. I've done everything possible to make it work.. Any solutions?

You are running a legit copy right?

Also could you please post system specs: cpu, ram, video card and make sure your drivers are all current.