APCS provides IT Services to 100's of clients. All of our clients have 4 to 5 Security and Privacy Extensions added to their Web Browsers. Adblocker Ultimate is one of them and it does a fantastic job in blocking all types of Ads. It is also easy to both install and manage. APCS only uses their Extension and does not install their windows program into PCs. I rate it 5 Stars for sure!! I also send them money for their excellent product and upkeep of it too.