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MiniTool Solutions to "The RPC server is unavailable" Windows Backup Error

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

The problem often occurs on Windows 10, especially for version 1803, 32-bit. 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.

If you are troubled by this issue, don't worry. In this article, I will show you another professional backup software, as well as different 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, I 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.


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 Destinationsection 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.

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 Schemefeature for help. Meanwhile, disk space management will be enabled.

How to Fix The RPC Server Is Unavailable Windows 10 Method 1: 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.

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

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.

Step 5: Go to the path below:


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

Method 2: 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.

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.

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.

Step 4: Click OK to save the changes.

Method 3: 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.

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. Before trying out these methods, ensure your RPC services are running properly

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