It seems you're constantly having problems with your Counter Strike : Source installation, and I'm actually amazed that one person can have so many issues.

Post your PCs specs here. Make sure your graphics card drivers are up to date (I mean go their website and manually download the drivers and install them, dont let Windows do it automatically because they suck) as well. If you're one of those guys that is constantly fucking around with their CS:S files (installing new skins and GUIs), then STOP IT.