NDIS.sys error.... What can i do?

Hy... I'm from Romania. I downloaded the RC version of this OS and i've installed on my PC with AMD 5400+ processor, 2,8 GHz, 2 GB RAM and components from ATI(video card, chipset, etc.). Seems like after 1 day of good function it crashed with a bluescreen error and telling me about a "ndis.sys" error... I'd seek on google and found that this error was in windows 98 and 98SE with proccesors bigger than 2,1 GHz. But i don't think that is my problem. I don't belive that a current operating system has the problems of an antique operating system. Someone has this problem too?

Are you able to boot up in safe mode and roll back your system to the previous day? It could be that one of the drivers you've installed is incompatible with Windows 7.