Garry's Mod 10 doesn't start.

I tryed playing Garry’s Mod today, and as usual the ‘Preparing to launch Garry’s Mod’ window comes up, But then, after about two seconds, it goes away and nothing happens. So, can anybody help?

same :confused:

Right click on Garry’s Mod in Steam, and select “Properties”. Click on “Set launch options”, and in the box that pops up, type “-fullscreen”. Garry’s Mod should now operate normally.

^he^ posted that in 3 different threads about the same problem, This solution even is in the example thread…