
Expand ‘Administrative Templates’ (it’s under ‘User Configuration’). Expand ‘System’. Click ‘Driver Installation’.

In the right panel, double click on ‘Code Signing for Device Drivers’.

Choose ‘Enabled’ in the window that appears. In the underlying options, choose ‘Ignore’. This disables drivers signing in Windows 7, and now you can install unsigned drivers in Windows 7.

Click Apply, OK. Restart your computer to install unsigned drivers.