This policy setting allows you to specify the order in which Windows searches source locations for device drivers. If you ...

This policy setting allows you to specify the order in which Windows searches source locations for device drivers. 

If you enable this policy setting, you can select whether Windows searches Windows Update first,  searches Windows Update last, or does not search Windows Update.

If you disable or do not configure this policy setting, members of the Administrators group can determine the order in which Windows searches source locations for device drivers.