I have a couple of Windows 7x64 Pro boxes that have been upgraded from 22.214.171.124.1 to 126.96.36.199.2. The mouse moves around but nothing happens when I click the Ctrl Alt Del button. I have uninstalled, cleaned up what I could find and reinstalled. I have uvnc running as a service. If I kill the service and run it as an application it works. What should I check?