When I run zac unr it takes my SQL server to its knees. I can run it on 1 workstation and it takes anywhere from 2 to 10 minutes to complete if it completes at all. If I run it on more than 1 workstation at any single time it cripples the database and nothing works at all. You can not log in, get bundles or policies or log in to the ZCC. I can not even get in to manage the database with the SQL utilities. I have to reboot the SQL server, the database goes into Recovery mode then after awhile it comes back and everything is back to normal. I have a call open but wanted to see if anyone else has experienced this issue. With imaging this summer nobody can unregister workstations from the zone. This is really putting everyone behind at this point.