So I got counterstrike, and so with playing on the servers, would things be downloaded onto my HDD, and later try to connect to the original server? Or would they have to go through steam first? Would explain by l4d, Cs:S are the ones that crash and lag so badly. I'm thinking I should allow the connection and stop blocking it, but I don't know if it's something 'negative'. No, that's just how your internet connects to the server, in the same way that you browse websites connect to port 80 and irc connects to port 6667. And blocking it could very well be causing your lag, yes. It's probably just an OEM app, according to google. Skatedog, is your computer a prebuilt? (An HP, maybe?)