Error setting display mode; Game won't launch

[Toaster Sex]

Everything was working fine, closed the game, downloaded the toy maker mod, opened vanilla game, and got this:

Build UT2004_Build_[2004-11-11_10.48]

OS: Windows NT 6.2 (Build: 9200)
CPU: GenuineIntel PentiumPro-class processor @ 1867 MHz with 3982MB RAM
Video: Intel(R) HD Graphics (3355)

Error setting display mode: No acceptable display modes found (D3D_OK). Please delete your KillingFloor.ini file if this error prevents you from starting the game.

History: UD3D9RenderDevice::UnSetRes <- FindBestMatchingMode <- UD3D9RenderDevice::SetRes <- UWindowsViewport::TryRenderDevice <- UWindowsViewport::OpenWindow <- UGameEngine::Init <- InitEngine <- FMallocWindows::Free <- FMallocWindows::Free

I deleted the .ini, still did it. Deleted the game itself, still did it. What am I doing wrong?

[Toaster Sex]

EDIT: Nevermind, checked the game's cashe integrity, that fixed it.

[Toaster Sex]

Ok, I legit need help. It's doing the same thing as the above, and nothing I do fixes it, totally unplayable, because it won't launch.

[Bigguns 93]

http://steamcommunity.com/sharedfiles/filedetails/?id=125107851