Visual glitch/glitch in 3D view on Source SDK

[My Names Ronnie]

So i installed Source SDK for CSS editing i wanted to make a Bhop map for a server i play on and everything installed smoothly. I opened it up in the C:\Program Files (x86)\Steam\SteamApps\common\Counter-Strike Source\bin directory like i was told to. But i get this weird glitch were my 3D camera is at a sort of angle and when i moved around with my AWD keys it moves weird. I didnt do anything to the settings i just opened it and it was like this. I have a screenshot but it probably wont help.

[sloprano]

I had the same thing happend to me and it turned out it was caused by an overlay software I was using, RadeonPro. Exiting the overlay software fixed it immediately for me.

If you are running Fraps or any other kind of overlay try shutting it down and see if the 3D view corrects itself.