Windows Backup and Restore is a snap-in tool for Windows system backup and file backup. But sometimes you may fail to create a system image with an error message "The backup failed. The RPC server is unavailable. (0x800706BA)". This post will give you another backup program and five solutions to solve this error code 0x800706BA in Windows 10.

The RPC Server Is Unavailable Windows 10 Backup

“I have had the message ‘The RPC server is unavailable’ when the PC tried to do the normal automatic back up. I tried to do the back up again but the same message came up. I have never had this before…”

This case often happens on Windows 10, especially for Windows 10 version 1803, 32-bit. In some forums, some users have reported that they get the information “The backup failed. The RPC server is unavailable. (0x800706BA)” while they create a system image.

Actually, the backup error 0x800706BA can also occur in Windows 7 and Windows 8. If you search for the issue, you will find some forums have mentioned it.

the RPC server is unavailable Windows 10 backup

Sometimes although you create a system image successfully with Backup and Restore utility, you may receive the same error 0x800706BA when restoring your PC from the created backup image file.

To put it simply, the common reasons for Win32 RPC server is unavailable in Windows 10 are malfunctioning RPC-related services, disabled file and printer sharing, corrupted registry files regarding RPC service, and issues with network connectivity.

If you are troubled by this issue, don’t worry. In the following, we will show you another professional backup software, as well as 5 fixes for Windows 10 RPC server is unavailable backup error.

Use Another Backup Solution: MiniTool ShadowMaker

If your computer faces Win32 RPC server is unavailable issue, we strongly recommend you to use another system backup solution, MiniTool ShadowMaker for creating system image.

As a piece of professional PC backup software, MiniTool ShadowMaker is compatible with multiple versions of Windows operating system, including Windows 7/8/10, etc.

And it can be used to back up Windows system, files & folders, disks or partitions to an external hard drive, USB flash drive, NAS and network with simple clicks. Additionally, scheduled backup, differential, and incremental backup are supported to keep your PC safe well.

To avoid the RPC server is unavailable Windows 10 backup issue, you can download MiniTool ShadowMaker Trial Edition on your PC to free use for 30 days.

MiniTool ShadowMaker TrialClick to Download100%Clean & Safe

After the backup, you can restore your PC to an earlier state from the image file when Windows system goes wrong.

Step 1: Run MiniTool ShadowMaker you have installed on your PC.

Step 2: If you haven’t created a backup for Windows 10, MiniTool ShadowMaker will remind you to click SET UP BACKUP button to go on. Additionally, you can directly click the Backup feature in the toolbar to start a backup.

In this interface, you can discover that system partition that is required for Windows to run has been selected in the Source section and a destination folder has also been chosen in the Destination section by default.

Then, you can directly click Back up Now to perform a system image backup without the RPC server is unavailable 0x800706BA error in Manage page.

MiniTool ShadowMaker backs up the system by default

Some things you can pay attention to:

  1. If you want to back up system disk, please go to Source > Disk and Partitions to choose system disk and check all disk partitions. Besides, it is allowed to back up files or folders by entering the corresponding window.
  2. MiniTool ShadowMaker allows you to choose an external hard drive, USB drive, network or NAS as the storage path of the backup image file.
  3. To automatically back up your computer every day/week/month or when logging in or out of Windows, you can take advantage of the Schedule feature that is located on the bottom left-hand corner.
  4. If you want to only create backups for the newly added or modified data, you can ask the Scheme feature for help. Meanwhile, disk space management will be enabled.
Tip: After finishing a system image backup, we suggest using Media Builder feature in the Tools window to create a bootable disc or USB drive so that you can easily restore the PC to a previous state from the created system image when a crash occurs.

“The backup failed. The RPC server is unavailable. (0x800706BA)” error message happens on your Windows 10 PC? Now, get MiniTool ShadowMaker to back up your operating system easily and effectively without Windows backup error. Or you can share it with your friends.

MiniTool ShadowMaker TrialClick to Download100%Clean & Safe

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How to Fix The RPC Server Is Unavailable Windows 10

How to fix unavailable RPC service to ensure a successful backup? Here, we collect 5 helpful methods for you to get rid of the trouble.

Way 1: Ensure Your RPC Services Are Running Properly

The RPC server is unavailable Windows 10 backup issue can be caused by improper functioning of RPC service on every connected computer. To get out of trouble, you can ensure that all the services related to RPC are running normally. Just follow the steps below:

Step 1: Press Windows logo and R key on your keyboard to open the Run dialog. Next, input services.msc and click OK to the next step.

Step 2: In the Services window, scroll down to find these three items: DCOM Server Process Launcher, Remote Procedure Call (RPC) and RPC Endpoint Mapper. Then, check whether their status is Running and the startup is set to Automatic.

DCOM Server Process Launcher

Remote Procedure Call RPC and RPC Endpoint Mapper

Step 3: If they are not running, please go to the next method to change the related settings in the Registry. 

Way 2: Check Windows Registry 

To have the right registry settings to make sure the RPC is running properly is important for your computer.

If your RPC services are not set correctly, the RPC server is unavailable 0x800706BA may happen when you create a system image with Backup and Restore (Windows 7) utility. Thus, you should modify the registry to fix error code 0x800706BA in Windows 10.

Warning: Windows Registry is a sensitive database. If you make any mistake when changing it, some unexpected problems may come out and damage your computer. Here, it is strongly recommended that you should back up the registry and create a system restore point or back up the system with MiniTool ShadowMaker (as mentioned in part 2) before you proceed.

The following is how to edit Windows registry to fix Windows backup error 0x800706BA.

Step 1: Log in your operating system as administrator since editing registry requires administrator privileges.

Step 2: Open the Run dialog box by pressing Windows log and R key on the keyboard. Then, type regedit in the text box and press Enter to open Registry Editor.

Step 3: In the Registry Editor window, navigate to the following path: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\RpcSs

① Please check whether all the listed items in the figure below exist. If there is any item not existing, it is suggested that you should reinstall your Windows 10 system.

RpcSs key in Windows registry

② If you find Remote Procedure Call (RPC) is not correctly set when you try the method 1 to fix unavailable RPC backup error, you can double-click on Start registry key in RpcSs to modify its Value data to 2.

set RpcSs value data to 2

Step 4: Navigate to the location:


Then check if none of the entries in the following figure are not missing. If DCOM Server Process Launcher is also not correct when you checking it in Services window, double-click Start key and set its Value Data to 2.

DcomLaunch key in Windows registry

Step 5: Go to the path below:


① Similarly, check whether there is an item missing. If yes, you also need to reinstall the Windows system.

② If you have tried the first method and also have found the setting of RPC Endpoint Mapper is not correct, please right-click on Start key to choose Modify and change the Value data to 2.

RpcEptMapper key in Windows registry

Step 6: Close Registry Editor and see whether the RPC server is unavailable Windows 10 backup issue occurs.

Way 3: Configure the Firewall on Your Computer

In some cases, the Firewall may be blocking the traffic that is requested by RPC. As a result, the RPC server is not available 0x800706BA error appears when creating a system image in Windows 10.

To fix this Windows backup issue, please check your firewall configuration and see if it is preventing the RPC from connecting to a network.

Tip: If you are using a Firewall from third-party manufacturers, please read its instructions carefully or do some research about it so as to unblock the RPC network connections.

Follow these steps to check the Firewall now:

Step 1: In Windows 10, type control panel in the searching box and click this tool in the results to open it.

Step 2: Go to System and Security, click Windows Firewall and click Allow an app or feature through Windows Firewall option.

Windows Firewall in Control Panel

Step 3: In the pop-up window, scroll down to find Remote Assistance and make sure all the boxes for Private and Public are selected.

allow Remote Assistance in Windows Firewall

Step 4: Click OK to save the changes.

Way 4: Check Your Network Connection

Sometimes, “The backup failed. The RPC server is unavailable. (0x800706BA)” occurs in Windows 10 because the network connection is not set correctly. Thus, here you can check it. Just follow the guide below:

Step 1: Also, you need to call out the Run dialog, type ncpa.cpl in it and hit Enter key.

Step 2: In the Network Connections window, right-click on the network you are using, and choose Properties from the context menu.

Step 3: Check whether File and Printer Sharing for Microsoft Networks and Internet Protocol Version 6 (TCP/IPv6) are enabled. If not, please tick the corresponding checkbox.

check network conenctions

After that, you can use Backup and Restore tool to recreate a system image and see if the error code 0x800706BA occurs in Windows 10.

Way 5: Upgrade Your System to a New Version or Downgrade to a Previous Version

It is reported that Win32 RPC server is unavailable issue often happens on Windows 10 version 1803 when backing up Windows system. In this case, you can choose to downgrade Windows to its previous version or upgrade your OS to the latest version to get rid of the trouble.

Tip: Before you proceed the downgrade or upgrade, you had better back up your important files with the professional file backup software, MiniTool ShadowMaker (as mentioned above).

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Now, all information about Windows10 backup error code 0x800706BA is told to you. If you are troubled by the RPC server is not unavailable issue, you can use another backup solution, MiniTool ShadowMaker, to create a system image with simple clicks.

MiniTool ShadowMaker TrialClick to Download100%Clean & Safe

If you still want to use Windows built-in backup tool for system backup, you can try the above ways to fix error 0x800706BA.

Additionally, if you have some questions related to our software or other solutions to resolve unavailable RPC service error, please leave a comment to us or send an email to [email protected].

RPC Server Is Unavailable Windows 10 FAQ

What does it mean when the RPC server is unavailable?
If you receive the “RPC server is unavailable” error, this means the computer goes wrong when communicating with other machines via the network you use. It can be resolved easily.
How do I troubleshoot the RPC server is unavailable?
  1. Ensure your RPC services are running properly
  2. Check Windows Registry
  3. Configure the Firewall on your computer
  4. Check your network connection
  5. Upgrade your system to a new version or downgrade to a previous version
How do I enable RPC server?
  1. Input services.msc to the search box and click Services.
  2. In the new window, find Remote Procedure Call (RPC) and set its Startup type to Automatic.
  3. Do the same for the Remote Procedure Call (RPC) Locator service.
What is RPC server?
RPC server, also known as Remote Procedure Call server, is a network communication interface to offer remote communication and connection services to RPC clients. It allows remote clients to connect, execute commands, and transfer data over the RPC protocol.
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