I bought Gmod yesterday, downloaded it, and tried to play. A blue loading screen popped up for 3 seconds and closes without a warning. I re-installed, did the '-dxlevel 81', checked if all the files where there. But it didnt work for me. I never ever downloaded any addons or mods or something else. just a vanilla game. I also tried the game windowed and other solutions. Please help me.
Verify TF2 and CS:S if you have those games installed.
