Disable Windows 8 Auto Repair
Windows 8 comes with a handy "feature" called "Automatic Repair", which is supposed to fix your Windows installation.
I've seen this utility ran dozens of times, on dozens of machines, without success. Not a single time has it worked. I'll take my chances with Windows not booting and be fixable, so goodbye auto repair.
To disable it, open up cmd.exe as Administrator and run:
bcdedit /set {current} recoveryenabled NoSource: https://social.technet.microsoft.com/Forums/windows/en-US/df2eed2a-67e2-498e-ae6b-42d171ccacd3/disablebypass-windows-8-automatic-repair?forum=w8itprogeneral