. This is the basic procedure:
If a game update comes out later on and you need to update, here's how to do it:
1. Shut down your server.
2. Click "Start" and then click "Run".
3. Type "cmd" into the blank and hit enter.
4. Type these commands:
hldsupdatetool.exe -command update -game "Counter-strike source" -dir sourcebase
It should respond with a bunch of lines downloading files. If that procedure gives you any trouble, please let me know.