Lightspeed Systems (Web Filter)
So I've posted about this before but I didn't know there was an actual client for filtering. If anyone knows how to remove please pm me. Basically, I can stop almost all processes but there are still being registry keys that are being written and when I go to delete those keys (even as admin with perms) I get an error writing the value. Also, when trying to stop the process(even as system) I get access denied. Rip me.
LS also has a server-sided checker to see what computers are still running on the network but are no longer running it's framework, then it automatically restarts it and hides the process from the user's side.
Had it at my highschool, it's pretty solid.