When I start the game it launches and everything works, untill i push continue or load from the main menu, it starts to load the game but it crashes, and a window opens that says: falloutnv has stopped working. I dont know what to do about it. is there someone that can help with this problem?

Not without useful system information, no.

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 5670 / Geforce GT 240
Video Card Driver Version: Catalyst ?.? / Nforce ??.??
. . (please use the numbers, and dates, *not* the word "latest")
Video Card onboard RAM: ? ? ? MBs
Sound Card Manufacturer:
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.)

P. S. Please use every day business style paragraph breaks, punctuation, and spelling.

Processor name: Pentium ® Dual-Core CPU
Processor speed: 2.50 Ghz
Operating system: Windowsxp
System Ram: 4,00G
Video (GPU) manufacturer: Nvidia
Video card model: Nvidia Geforce GT 240
Video card driver version: 8.17.12.5896
Video Card on board Ram: 1024
Sound card manufacturer: Realtek high definisjon audio.
Sound Card model: 6.0.6000.16386