My situation was that was running the remote PowerShell command
restart-Computer when I got
this error message on the Windows 7 machine: The RPC server is unavailable. (Exception from HRESULT:
0x800706BA)
The Cause of Code 800706BA
The underlying cause of my problem was WMI. I was using PowerShell
cmdlets such as get-WmiObject that were trying to access data on another
Windows 7 computer. What happened was that the firewall was correctly, blocking
the RPC ports 135 and 445. Thus I simply disabled the firewall on the
target machine and the command then completed successfully.
‡
Example of PowerShell Script
Restart-Computer -computerName LittleServer
# or
Stop-Computer -computer ExchServer
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