HELP PLEASE! FSX keeps crashing

whenever i start flying in 'live' FSX out of the blue my screen goes all black and shakes and compeltely shuts off and restars. It is very madening and frustrating. RIGHT in the middle of taking off or on approach, basically at te worst time. I havent run solo flights so i dont know if it does this. sometimes it does not crash at all. What could be causing this?

My system is as follows.


2.13 gigahertz Intel Celeron
16 kilobyte primary memory cache
256 kilobyte secondary memory cache

41.10 Gigabytes Usable Hard Drive Capacity
9.39 Gigabytes Hard Drive Free Space

Board: P4M800-8237 PCCHIPS P25G
Bus Clock: 133 megahertz
BIOS: Phoenix Technologies, LTD 6.00 PG 06/21/2005

NVIDIA GeForce FX 5500 [Display adapter]
VIA/S3G UniChrome IGP [Display adapter]
DELL P991 [Monitor] (18.0"vis, s/n 8376T03700FR, March 2000)

Realtek AC'97 Audio for VIA (R) Audio Controller
Unimodem Full-Duplex Audio Device
Xtreme Sound PCI Audio


ANy have any ideas or suggestions? I did once get a prompt in the middle of a flight about low virtual system memory (it was set to 350mb i believe) and i went in and bumped it up to 1800mb.

your system specs are almost identical to mine :p except for i ise the geforce 6600le. i would think that this is either a ram problem or overheating problem.how much ram do you have?

RAM is about 1.25GB.

do a virus scan and spyware scan.and check if it might be overheating because fsx really pushes the cpu