Another user had already rebooted server. I got around the backup issue by creating a specific folder on the server to hold data for the client, then did a manual copy and paste from my PC to the server folder. It seems to work. We really should not have to reboot every time someone uses a client, but this is becoming more frequent. We reboot our PCs every night before we go home. The server does get rebooted, but it is such a long process and shouldn't have to be done all of the time.