This Wont stop happening, Garry, please Help?

Well, here it is, whenever I go to start up Garry’s Mod, the notice comes up that says “Launching Garry’s Mod…” and the it goes to a Blue screen with the little loading icon in the bottom right, and then it closes without a notice, I have bot Counter Strike: Source and Team Fortress 2 if that helps in any way…


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