I wanted to install Windows 8 with a volume partition and when the Windows 8 was installing it rebooted and it gave me an error:

The digital signature for this file couldn't be verified. File :windows \system 32\winload.exe error code 0xc0000428.

I have tried bootec commands and they didn't seem to fix it.

Also my Windows 7 got deleted and I only have to boot with the Windows 8 error, so I can't do anything not even boot to safe mode. I have tried to install Windows 8 from disk later on and it won't let me because it keeps rebooting and starting the installation again, so I took off the disk before it rebooted and it takes me to that error again.

Remember that's my only boot option so I'm stuck in the installation disk.