Microsoft Azure Recovery Services Agent System State Backup failure (error ID 8007007B)

Applies to: Azure Backup


This article describes the symptoms and resolution for an error that occurs when you back up System State by using the Microsoft Azure Recovery Services (MARS) Agent.


One of the following error messages appears on the Errors tab of the Job Details dialog box that corresponds to a failed System State backup job on the Microsoft Azure Recovery Services Agent console.

Possible error message 1

Possible error message 2

Example of these error messages

Job Details

When you click WSB Failure Logs, a file opens that contains an error message that resembles the following:


This error occurs when the file specification that is required for enumerating files that must be backed up as part of the Windows Server System State is updated incorrectly.


Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall the operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.

To make sure that the file specification is updated, follow these steps:

  1. In the file that opens when you click WSB Failure Logs, verify that the Systemroot_path is correct. For example, Systemroot_path in the following error message should resemble C:\Windows\\systemroot\:
  2. Run the following command at an elevated command prompt:
    diskshadow /l Output_File_Path
    Note The Output_File_Path placeholder should resemble C:\outputfilepath.txt.
  3. Type the following commands at a DISKSHADOW prompt, and then press Enter after each command:
    list writers detailed

  4. Open the output file that you specified in step 2.
  5. Locate the line that contains Systemroot_path (C:\Windows\\systemroot\ in our example above). For example, the line should resemble the following:
    File List: Path = Systemroot_path \system32\drivers, Filespec = File_Spec_Path


    File List: Path = c:\windows\\systemroot\system32\drivers, Filespec = winmad.sys
  6. Start Registry Editor. To do this, right-click Start, click Run, type regedit in the Open box, and then click OK.
  7. Locate the following subkey:
  8. Right-click Services, and then click Find.

    Registry Editor
  9. In the Find what box, type the File_Spec_Path path that you found in step 5, and then click Find Next.



    Search file

    The search results will feature a registry key that is named ImagePath. If its value has a leading backslash ‘\’, then double click that value and remove it. If the value does not start with a backslash, submit a support request from the Azure Portal.
    Before change After change
    Image about the registry key that has problem
    Image about the correct registry key value
  10. Go back to the MARS Agent console and start a System State Backup by clicking Back Up Now.