"Connection to RPC server in the workstation failed."

"Connection to RPC server in the workstation failed."

I am unable to successfully scan any of my workstations and servers. The last Windows domain scan was three days ago, which completed successfully. I took three random workstations, ensured Windows Firewall was disabled as that is the standard here, and manually executed scan_setup.vbs which is also used as a user logon script on the AD server. The only thing different from today and three days ago is I updated ServiceDesk from 8109 to 8110 (AFTER my Windows domain scan failed for every workstation).

What is the problem here?

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