SoftXpand prerequisite:

The ‘Driver Signing Option’ policy is not set to ‘Block’.

In order to make sure your Driver signing option is not set to block:

See Windows Start - Settings - Control Panel - System - ‘Hardware’ tab - ‘Driver Signing’ button.

The value can be set for ‘ignore’ or ‘warn’.

Make sure it is not set to block.

If it set to block the MiniFrame display driver will not be able to be installed.