If you recently installed a protection agent on %ServerName;, the computer may be restarting. Wait a few minutes after restarting ...

If you recently installed a protection agent on %ServerName;, the computer may be restarting. Wait a few minutes after restarting the computer for the protection agent to become available. If the problem persists, do the following:
1) Verify that %ServerName; is remotely accessible from the DPM server.
2) If a firewall is enabled on %ServerName;, verify that it is not blocking requests from the DPM server. 
3) If %ServerName; is a workgroup server the password for the DPM user accounts may have changed or expired. To resolve this error, run SetDpmServer with the -UpdatePassword flag on the protected computer and Update-NonDomainServerInfo.ps1 on the DPM server.
4) Restart the DPM Protection Agent service on %ServerName;. If the service fails to start, uninstall the protection agent by using Add or Remove Programs in Control Panel on %ServerName;. Then in the Management task area, on the Agents tab, in the Actions pane, click Install to reinstall the protection agent on %ServerName;.