Fail To Create D3D Device

[OSVG]

I cannot play any source engine game.

I've tried everything listed here
https://support.steampowered.com/kb_article.php?ref=1740-IMNO-4856
(using dxlevels 80 & 81 for all games)

Drivers are up to date
Tried Reinstalls of MP games
Reinstall Direct X

The only thing left I know to do is complete delete every source engine based game and reinstalling

 

[Stinky Wizzleteats]

I had that error a while back with my ATI card. dxdiag showed that I was failing the Direct3D test, but DirectDraw passed. I ended up having to remove the catalyst app & my drivers & then rebooting & reinstalling from the stuff on the ATI site.

 

[Toasteddude]

Have you tried a reinstall of DirectX?

 

[OSVG]

Thank you for suggestions. I found the problem my folding@home GPU client was causing the error.

 

[Hibiki]

How on earth would the folding client cause a D3D Int failure? Was the client running while trying to boot up a game?

 

[WaterSnake]

I got that error from mass effect, after I installed all of my source games would give me that error. I still haven't fixed it, I just had to create a restore point and go back to before I installed ME.