I was getting BSOD on my Acer Aspire 9300 laptop. So I rebuilt it from the Recovery partition to factory build state . I installed Windows update & AVG 8 antivirus and BSOD reappeared I found I could boot into safe mode OK. I reviewed C:\WINDOWS\Minidump with WhoCrashed - [URL]http://www.resplendence.com/downloads[/URL] and it highlighted Acer eLock Management component eLock2FSCTLDriver.sys was the problem A quick google search and I found other where experiencing the same problem [size=7][b]How to fix [/b][/size] uninstall Acer eLock Management Boot to safe Mode (F8) Enable windows installer service Create a Registry entry, open command prompt ( Run->Cmd). Type the following command in the Window- REG ADD HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Minimal\MSIServer/VE/TREG_SZ/F/D “Service” net start msiserver. Then Uninstall Acer eLock Management All is now fine.