We have a room of 38 Windows 7 clients, and they're randomly disappearing from the database. I re-register the devices and they appear, but after a reboot they disappear again? Any reason for this? The agent on the desktop says they're managed and they're receiving bundles, but I can't see them in the ZCC. This is getting really frustrating, they're all ZCM 11 with the cumulative update 2 on them.