Vista on a Dell Inspiron 1521 laptop. This laptop was infected with a couple of trojans and rogues as well as other malware. I used Malwarebytes and it found and removed 40 some variations. It was also installing SP1 at same time. Once SP1 was done I rebooted. It begins to boot but right after the Windows screen with the moving bar it goes back to a white text on black screen and begins a scan that appears to be Malwarebytes or some other "scan on boot". I am presuming MWB since that is what i had scanned with. It lists 98xxx files and begins scanning. When it gets to 580 / 98750 it halts and reads: ! 0xc000003a ! (MPEngine.dll) It sits there until I turn it off and restart. It won't start in any safe mode, it just gets past loading all of the drivers and stops. I can boot from Vista DVD but it tries to repair and fails and reports that it cannot repair. I am thinking if I can shut off the boot-on-scan then I may be able to boot up and get things repaired to where it will boot consistently again. I need to apply more Vista updates and SP2. Thanks in advance for any help.