How to solve “The RPC server is unavailable” error

RPC uses port 135. This port can be blocked on the computer. So you have to add an exception in the Windows firewall.

Create a GPO to open this port number:

  • Open the Group Policy Object Editor
  • Go to Computer Configuration,
  • Administrative Templates
  • Network
  • Network Connections
  • Windows Firewall
  • Domain Profile.
  • Windows Firewall: Allow remote administration exception.
  • click Enabled.

Note: You can filter by IP source for incoming request/message.

When it’s done, refresh policies on computer with gpupdate /force and retry.


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About Nicolas 282 Articles
I work as an IT Production Manager, based in Paris (France) with a primary focus on Microsoft technologies. I have 10 years experience in administering Windows Servers. . I am a Microsoft MVP for Cloud & Datacenter Management. I also received the PowerShell Hero 2016 award by PowerShell.0rg. And finally, I am "MCSE: Cloud Platform and Infrastructure", "MCSA: Windows Servers", "Administering & Deploying SCCM", and CheckPoint CCSA certified.