Not a single source game will run.

[Goat]

Hey all, I was playing GMod when all of a sudden a wild BSoD appears! I restart my computer and think nothing of it but now not a single source game will run. All it does it say the Preparing to launch (source game)...
Here is a video of exactly what it does:
ScreenCapture 11 22 2011 9 08 26 PM
Edit:

9:34 PM - Goat :3: now to system restore
9:35 PM - Steve4448: My garry's mod isn't starting either.
9:35 PM - Goat :3: what
9:35 PM - Steve4448: I'm serious
9:35 PM - Steve4448: it's not :|
9:35 PM - Goat :3: does it say preparing to launch garrys mod?
9:35 PM - Steve4448: Yes.
9:35 PM - Goat :3: holy
9:35 PM - Goat :3: fucking
9:35 PM - Goat :3: fuck.
9:35 PM - Goat :3: update is dun broken?
9:35 PM - Goat :3: ?!??!?!/1?/!/
9:36 PM - Steve4448: 1 sec.
9:36 PM - Goat :3: gonna sys restore.
9:36 PM - Steve4448: okay
9:36 PM - Goat :3: when im on again ill uh
9:36 PM - Goat :3: yeah.

[sledog]

Yea I have a borked steam system either; so I think someone at the Valve bricked the steam interface.

[Goat]

Yea I have a borked steam system either; so I think someone at the Valve bricked the steam interface.

Thank god, now i know its not my computer.
EDIT: did a system restore. gmods working again. id reccomend it to you aswell.

[sledog]

Hint you can always just restart steam, and you'll probably fix it.

[infamybandit]

If it really stopped working, easiest first fix to do is restart your computer once more. Second fix is to go into Steam and manually click game options, then verify steam integrity of cache for each game. Third solution, System Restore. Fourth solution, remove the games through Steam, then re-download and reinstall. Fifth and final solution, delete Steam, and redownload that and install that first. Then redownload the games.

[Ἆxule]

I didn't have this problem.
I'm wondering why it only happened to a few and not everyone

[Juan_Ambriz]

Yeah I didnt get this problem either

[[Valor]iPounce]

If it isn't still starting, Exit steam, delete the client.blob thingy on your steam folder and reopen steam, it should be downloading a new client.blob thingy again.