You are not the only one and many users have reported this issue.
HereMiniTool Solutionwill help you to fix it easily with multiple methods.
Usually, it can happen in Windows 10/8/7 and Windows Server 2016.
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Get an oops message “The backup failed.
The RPC server is unavailable.
(0x800706BA)”?

Now try these solutions to fix this backup error.
Additionally, RPC can be the Service Control Manager for DCOM and COM servers.
So, you should ensure the Remote Procedure Call is running on your setup.

In the following part, we will show some possible methods for you to fix this issue.
Note that we use Windows 10 as an example.
Of course, these solutions can be applied to Windows 8/7, Server 2016, etc.

Just take these actions below to check for their tweaks.
PressWin + Rto get the Run window, inputservices.mscand clickOK.
LocateRemote Procedure Call (PRC) locator, double-click it and set its Startup throw in toManual.
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FindDCOM Server Process Launcher, double-click it and set its Startup jot down toAutomatic.
This solution can be helpful to fix the Remote Procedure Call failed error when opening an app.
So, you should run an antivirus program on your PC.
In Windows 10, Windows Defender provides real-time protection.
Just run it right now.
Malwarebytes vs Avast, which one is better for you?
This post shows some differences between Avast and Malwarebytes.
So you should uninstall the cleaner if you have one.