Use the following steps to disable SmartScreen:

1. Click the Start button and open Settings
2. Open Update and Security
3. Move to the Windows Security section
4. Click App & browser control
5. Under the Reputation-based protection heading, click the Reputation-based -protection settings
6. Disable the Check apps and files setting by moving the toggle to the Off position

A better option, however, is to leave SmartScreen enabled, but unblock individual apps you know can be trusted on an as-needed basis.

The steps to disable SmartScreen protection for an individual app you know to be safe are very simple:

1. Right-click on the executable in question and select Properties
2. Move to the General tab
3. Toward the bottom of the dialog, check the Unblock box in the Security section
4. Click OK

That's all there is to it; you should now be able to run the LUFIER driver.