Hi everybody. getting the strangest crash!! let me describe in detail. Problem ________________________________________________________________________________________________________________________________________________ First off all I switch on my pc, then wait for it to aquire network. Then (normally after computer has been on for an hour or so) usually during a internet game off some sort (dow2 and cod5 war are particular candidates but not the only ones). The Internet suddenly disconnects (network indicator shows yellow exclamation mark). Then when I reboot I get an error message saying something like windows cannot locate file c/windows/sytem32/user data. Cannot log user onto windows network. At this point the desktop usually looks like windows 7 basic (ie, the task bar and start menu have turned grey and lost there nice rounded edges) I have no internet/network, and a lot off my programs have dishapeared from the "start" menu!!! Then I have to reboot again (normally about 3 seems to do it!) until I get my "normal" desktop and network connection back. Then the pc is fine again for a couple off hours! ______________________________________________________________________________________________________________________________________________ Fixes I have allready tried. When I first installed win 7 the problem was really bad, but as I had had a virus attack I just assumed it was to do with that, So I re-installed win7 (full format/clean install) and that seemed to fix the problem + setting the computer to be the master browser. Then after about 4 days off problem free use, it started again!! _______________________________________________________________________________________________________________________________________________ Could it be a hackker? (I seem to get a lot off virus's despite never having used this computer for file shairing, allthough I used to on my old computer and my Ip is still the same) Also I built another computer using 680i chipset intead of the 790i in my current rig and it runs perfectly!!! Any help (no matter how vaugue) will be welcome as I have been reselling with this problem for some time! Many thanks ramos.