RPC Server is Unavailable
Symptom: RPC server is unavailable
The RPC server is unavailable. (Exception from HRESULT: 0x800706BA)

Solution: Add firewall exceptions
- Log in to your target machine.
- Verify that the WMI traffic is enabled, if not, add an exception,
via the firewall UI, or command-line:
Using firewall UI:
- Control Panel > Windows Firewall > Allow an app
or feature through Windows Firewall
- Click on 'Change settings' if available
- In the Allowed apps and features: pane, select
Windows Management Instrumentation (WMI) and
apply it to your network setup (for example, select Domain
if both the host and the target use the same domain)
NOTE: for more information about Domain/Private/Public
please consult your system administrator and/or MSDN documentation
on this topic.
- Click OK.
Using command-line:
netsh advfirewall firewall set rule
group="windows management instrumentation (wmi)" new enable=yes
- Launch the debugger again.
If the RPC server is still unavailable, you may need to open the DCOM
TCP port 135. To open the port, add an exception:
netsh advfirewall firewall add rule dir=in name="DCOM"
program=%systemroot%\system32\svchost.exe service=rpcss action=allow protocol=TCP localport=135
For more information, see Connecting to WMI Remotely Starting with Windows
Vista at https://docs.microsoft.com/en-us/windows/desktop/WmiSdk/connecting-to-wmi-remotely-starting-with-vista.