ARD update 3.9 for client and admin is causing heartburn among users. I use it for a college teaching studio, or at least I did until the upgrade. The "access denied" problem is wide-spread, stubborn, and disastrous for users like me. There are plenty of solutions floating around but none are as good as pre-upgrade. Rather than waste time scrambling settings in my studio, I'll change teaching techniques, invent new ones, and get plenty of exercise touching all the machines I used to shut down, upgrade, etc. from my computer. Big pain.