windows help

[R1C0CH3T]

i turn on my dell 9100 dimension, and one of the first screens that pops up(im in safe networking mode cause when i do regular mode, just my background appears and all the sounds work)again, in safe networkin mode, it says it couldnt find system32/config or somthin like that. is this a virus and any1 know about it? also about the bacground problem? i have 1.5 gigs of ram and would like to continue my pwning ways on bf2.thanx