Hi

When I play my game Operation Flashpoint RES I get an error sometimes don't know why... it says
Fault address: 7C90E4F4 01:0000D4F4 C:\WINDOWS\system32\ntdll.dll

in the

RPT file error in the main folder of the game. Also have my textures change to weird weird stuff... and then my whole screen just flickers and I cannot do anything but turn my computer off and restart... no errors come up after restart either. I install two old games today desert storm 2 and vietcong just 5mins during game play or something they both just crashed.... I have xpertvision 6.1 and I put my core clock memory clock and shader clock to full and not linked also. temp is about 55 in game 49 out. I installed the lastest driver for my GPU but my computer just kept crashing for some weird reason... so I am still on 6.14.11.8585.

Specs: intel cereron D 3.0ghz
RAM DRR 1.5
GPU 8600GT 512MB

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