The Source SDK is not working for me, and yes, I've looked at the other SDK not working threads and my problem's different. Everytime I click on Source SDK, the window saying "Preparing to launch" appears for a brief second and then goes away immediately. The sdklauncher.exe process does not even appear. This is annoying. Steps I have taken so far: *Played Team Fortress 2 *Verified integrity of cache *Searched Google for solutions-- none found *Uninstalled and reinstalled Source SDK *Deleted ClientRegistry.blob It's still doing it. Help???