I created a GPO to set "use popup blocker" to enabled. The setting is located under "user policy".
So I added my system name and my username under "security filtering", and linked the gpo to the OU's that my system name and username are located.
I've forced a replication in sites and services, and ran gpupdate /force and rebooted multiple times. But the gpo still shows up under : The following GPOs were not applied because they were filtered out.
Filtering: Not Applied (Empty)
I have no idea what this means and why the gpo will not get applied.