Uninstalling NAM helped me out, the file corruption problem disappeared.
I have now another problem, with oc the processor. In my board there was originallly the 1006 bios. it didnt alowed oc my processor, i didnt workd at any fsb etc.... after i flashed in the 1008 bios and after it , it allowed to overlock! i used it at 8.5*300 with 1.5 voltage, maybe i could have reduced the voltage to under 1.5 v, but it was good also so i didnt want to give a try. So it was stable at 2550mhz, prime run for a few hours, games very perfect etc.... yesterday there was a little accident in my pc. the potmeter which i tryed to use to reduce the 12 cm ventillator's speed, was smoked, there was a small sparkle, it frightened me a lot. i turned off my comp at that moment, everything is ok in my pc. but after that my pc didnt worked with this poiting that i figured out in the first part of my reply. so i cant oc my processor just when i had the 1006 bios in my board. i flashed again the 1008 than the 1010 beta and there is no change. i have no idea what can couse this, and why, i saw that this e6 processor can be overclocked easily but now i cannot find what i changed in the bios or somewhere, to allow to oc it again.
anyone who has an idea about this problem?