Inside the vault, many graphics effects aren't being used, then when they are switched on leaving the vault, the load can trigger a variety of problems. Start from point one and work your way through. Here is the hardware component rundown. Fill it in.
Basic Hardware Specification Chart (Empty so far)
Processor Manufacturer: AMD / Intel
Processor Name / Type: Athlon X2 / Pentium D / C2D / dual core / quad, etc.
Processor Speed: ?.? Ghz
Operating System / Service Pack: WindowsXP with SP #?, Win7, Vista ?
System RAM: ? ? GBs (MBs, if less than 1024 ? )
Video (GPU) Manufacturer: ATI / Nvidia (
only those two are supported, PERIOD, so please answer which of them you have)
Video
Card Model: (examples) Radeon HD 6670 / Geforce GTS 450
Video Card Driver Version: Catalyst ?.? / Nforce ??.??
. . (please use the numbers, and dates, *not* the word "latest")
Video display's default screen resolution
Video
Card onboard RAM: ? ? ? MBs
Sound Card Manufacturer:
Sound Card Driver IDs:
Sound Card Model:
(And this is only for the raw hardware & driver variations. Potential software conflicts are far more likely to be game play problems, and developers cannot test for all possible program loads.)