“The RPC server is unavailable. (Exception from HRESULT: 0x800706BA)” error may occurs when executing PowerShell scripts using WMI query. There can be a few reasons for this error: The remote computer is blocked by the firewall. Solution: Open the Group Policy Object Editor snap-in (gpedit.msc) to edit the Group Policy object (GPO) that is used to manage Windows Firewall settings in your organization. Open Computer Configuration , open Administrative Templates , open Network , open Network Connections , open Windows Firewall , and then open either Domain Profile or Standard Profile , depending on which profile you want to configure. Enable the following exception: “ Allow Remote Administration Exception ” and “ Allow File and Printer Sharing Exception “. Host name or IP address is wrong or the remote computer is shutdown. Solution: Verify correct host name or IP address. The “TCP/IP NetBIOS Helper” service isn’t running. Solution: Verity that “TCP/IP NetBIOS Helper” is running and set to auto start after restart. The “Remote Procedure Call (RPC)” service is not running on the remote computer. Solution: Verity that “Remote Procedure Call (RPC)” is running and set to auto start after restart. The “Windows Management Instrumentation” service is not running on the remote computer. Solution: Verity that “Windows Management Instrumentation” is running and set to auto start after restart
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