PC : Killing Floor Guest Passes

[Dymetrie]

Ok, so slight problem with available time until now, but have just tried to launch the game, twice, and get this lovely error:

Originally Posted by Critical Error

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

OS: Windows NT 6.1 (Build: 7100)
CPU: AuthenticAMD Unknown processor @ 2212 MHz with 4095MB RAM
Video: NVIDIA GeForce 8800 GT (9107)

Error setting display mode: CreateDevice failed (80070057). Please delete your KillingFloor.ini file if this error prevents you from starting the game.

History: UD3D9RenderDevice::UnSetRes <- CreateDevice <- UD3D9RenderDevice::SetRes <- HandleBigChange <- UD3D9RenderDevice::Lock <- UViewport::Lock <- UWindowsViewport::Lock <- UGameEngine:raw <- UWindowsViewport::Repaint <- UWindowsClient::Tick <- ClientTick <- UGameEngine::Tick <- Level Untitled <- UpdateWorld <- MainLoop <- FMallocWindows::Free <- FMallocWindows::Realloc <- 4C576C61 0 FArray <- FArray::Realloc <- 0*2 <- FMallocWindows::Free

Had to restart (explorer stopped working and I couldn't get it back) between attempted launches and deleted the suggester *.ini file to no avail