Having trouble rebooting your Windows 10 PC after restoring it to a previous version of Windows?

Actually, you are not the only one.

Here is a fix.

computer experiences a Stop error 0xc000021a

Serious is that the system will fail to return to the Windows desktop after restarting the computer.

It is not the first time that Patch Tuesday has inadvertently caused serious problems for Windows 10 users.

Last month,Microsofts April patch updates caused Windows to freeze and slow down.

Disable driver signature enforcement

Ironically, this fiasco is not triggered by the release of the Windows 10 security patch.

Then, it saves the information in the registry and it finishes the staged operation when the PC restarts.

Avoid Failed Restarts