Solved : "Windows Cannot Verify the Digital Signature for This File" (0xc0000428)

Hi

I have a  lenovo 310-15isk which I have free upgraded to windows 10 a couple of years ago.

I have created a 400gb partition (F) and am attempting to install windows 7 pro 64bit onto it.




this is so I can dual boot windows 7 and 10

when the computer restarts I am getting the following error message

windows boot manager

'A recent hardware or software change might have installed a file that is signed incorrectly or damaged, or that might be malicious software from an unknown source. If you have a Windows installation disc insert the disk and restart your computer. Click "repair your computer" and then choose a recovery tool. Otherwise, to start Windows so you can investigate further, press the ENTER key and display the boot menu, press F8 for Advanced Boot Options and select last Known Good. If you understand why the digital signature cannot be verified and want to start Windows without this file, temporarily disable driver signature enforcement.


 file: \$windows.~BT\windows\system32\winload.efi

Status: Oxc0000428 

Info: Windows cannot verify the digital signature for this file'