Crash on Startup

[aesguitar]

When I try to play, I get the "Preparing to Launch" screen for a few seconds and it just dissapears and never launches. I have tried clicking the .exe directly, same result. No error messages ever pop up. I have been able to play this game on this machine before, I can't figure out the problem. Yes, I have tried disable AV/Firewall.

Specs:
Windows 8.1
16 GB RAM
i7 3770 @ 3.4 GHz
1 GB GTX 560 ti

[Navig]

hjwjeh wkegfw

[aesguitar]

Very astute of you.

[koifishi]

Try updating your video driver.

[Cosmo]

Try to verify the game cache files.

[aesguitar]

Video driver is most recent. Verifying game cache didn't fix it. Tried several times.

[aNgelic_asceNt]

another way is to verify the the game files.
right-click the game then properties, under local files click verify

[Burning Edge]

İlk olarak Ice Master tarafından gönderildi:

another way is to verify the the game files.
right-click the game then properties, under local files click verify

same thing as game cache. Try reinstalling it perhaps...
I've been having the same problem and haven't found a solution yet :/

[UberSloth]

Same problem here!? After days of research and trying every trick in the book, still nothing. Whoever works this one out needs a medal! Bloody frustrating!.

[Burning Edge]

İlk olarak hijinX tarafından gönderildi:

Same problem here!? After days of research and trying every trick in the book, still nothing. Whoever works this one out needs a medal! Bloody frustrating!.

Seen lots of this in "discussions" lately. Valve, are you seeing this? do something...

[MKC_Kis]

I'm having the same problem here... I've tried all the possible solutions given but it still crashes on the first screen (after the Valve logo)...
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EDIT: I've tried now to disable tha Avira Web Protection and the game worked like a charm!

[Ninja Hamster®]

look in the windows event viewer under "Application" and post the result here. You can start portal2 and when it crashes the newest entry in the event viewer is for the portal2.exe then.

[aesguitar]

Faulting application name: portal2.exe, version: 0.0.0.0, time stamp: 0x53e27d60
Faulting module name: shaderapidx9.dll, version: 0.0.0.0, time stamp: 0x53c95280
Exception code: 0xc0000005
Fault offset: 0x0002cdcb
Faulting process id: 0x1a38
Faulting application start time: 0x01cfc238ae6bb86a
Faulting application path: C:\Program Files (x86)\Steam\steamapps\common\Portal 2\portal2.exe
Faulting module path: C:\Program Files (x86)\Steam\steamapps\common\Portal 2\bin\shaderapidx9.dll
Report Id: ee2a28b5-2e2b-11e4-82f8-ea8d4b7fce3b
Faulting package full name: 
Faulting package-relative application ID: 

[ententeak]

I had the same problem with PayDay2 and Portal2. And on both games works this:

1) Remove local content
2) Restart PC
3) Download and Instal
4) Play

[aesguitar]

Tried it, no worky

[UberSloth]

Me 2, no result