Old MPVI functionality with Windows 11.

If your laptop is running Windows 11 and will not let the MPVI drivers install or work properly due to being unsigned with Error 39, this is the fix.
Start Menu, search registry editor. Flip through the left file tree till you get to the following:

Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlS et\Control\DeviceGuard\Scenarios\HypervisorEnforce dCodeIntegrity

Change Enabled and WasEnabledBy values to 0 by double clicking each and putting 0 in the value data box.

Restart computer

Should now be functional.