Win 10 upgrade on Dell Optiplex desktop suddenly looping Preparing Automatic Repair then flashes to"Attempted Write To Readonly Memory" or "Page Fault in Nonpaged Area". What Failed: WimFSF.sys I've tried to get it to boot options so I can go to Safe Mode but it always loads Preparing Automatic Repair. Several forums say the WimFsf.sys is a Symantec file, but I know there were no Symantec products installed. I reaseacrched BSOD logs at top of the foump but I don't know how to get the DUMP files if I can't get a cmd line. Please Help!