HOBOcs, I tried building a Windows system with the OS on the D drive. I connected the hard drive from one of the "black screen" systems and mounted the drive as the C drive. I then copied the Quarantine directory from C drive to the D drive, opened MBAM and restored all the files to the C drive. However, this still did not work even after restoring all the files it could. Many didn't restore since there were system files in place. Did you try running the SFC command from Windows recovery console? This resolved about half of our black screen systems. Steps: 1. Run "bcdedit | find "osdevice" to figure out the drive. 2. Run "sfc /scannow /offbootdir=c:\ /offwindir=c:\windows" 3. Reboot and boot into safe mode 4. Run latest MBAM fix