Error while running DISM

Question

Per answers provided (thanks!) I ran DISM /Onlin /Cleanup-Image /RestoreHealth. It failed with error 0x800F0915. Below is the first 13 lines of the log, the last line contains the first failure message. Next? Again, thanks for any help! Norman Mahan

2025-10-08 08:34:11, Info DISM API: PID=27464 TID=35468 DismApi.dll: - DismInitializeInternal

2025-10-08 08:34:11, Info DISM API: PID=27464 TID=35468 DismApi.dll: <----- Starting DismApi.dll session -----> - DismInitializeInternal

2025-10-08 08:34:11, Info DISM API: PID=27464 TID=35468 DismApi.dll: - DismInitializeInternal

2025-10-08 08:34:11, Info DISM API: PID=27464 TID=35468 DismApi.dll: Host machine information: OS Version=10.0.26120, Running architecture=amd64, Number of processors=16 - DismInitializeInternal

2025-10-08 08:34:11, Info DISM API: PID=27464 TID=35468 DismApi.dll: API Version 10.0.26100.3653 - DismInitializeInternal

2025-10-08 08:34:11, Info DISM API: PID=27464 TID=35468 DismApi.dll: Parent process command line: "C:\WINDOWS\system32\cleanmgr.exe" /autocleanstoragesense /d C: - DismInitializeInternal

2025-10-08 08:34:11, Info DISM API: PID=27464 TID=35468 Input parameters: LogLevel: 2, LogFilePath: (null), ScratchDirectory: (null) - DismInitializeInternal

2025-10-08 08:34:11, Info DISM Initialized Panther logging at C:\WINDOWS\Logs\DISM\dism.log

2025-10-08 08:34:11, Info DISM API: PID=27464 TID=35468 Initialized GlobalConfig - DismInitializeInternal

2025-10-08 08:34:11, Info DISM API: PID=27464 TID=35468 Initialized SessionTable - DismInitializeInternal

2025-10-08 08:34:11, Info DISM API: PID=27464 TID=35468 Lookup in table by path failed for: DummyPath-2BA51B78-C7F7-4910-B99D-BB7345357CDC -

Answer 1

The error code 0x800F0915 typically indicates that DISM is unable to access the necessary files to complete the operation. This can happen if your system cannot connect to the Windows Update servers or if the required files are missing or corrupted. Here are some steps you can take to resolve this issue:

1. Check Internet Connection: Ensure that your computer is connected to the internet, as DISM needs to download files from Windows Update.
2. Use a Local Source: If your internet connection is unstable or DISM cannot access Windows Update, you can specify a local source for the repair. You can do this by using a working Windows installation as the repair source. Run the following command, replacing <servername> with the name of the computer you are using as a repair source:

      DISM.exe /Online /Cleanup-Image /RestoreHealth /Source:\\<servername>\c$\windows /LimitAccess
   

3. Run SFC: After running DISM, you can also run the System File Checker (SFC) to fix any remaining issues. Open an elevated command prompt and type:

      sfc /scannow
   

4. Check CBS.log: If the problem persists, you can check the CBS.log file located at %windir%\Logs\CBS\CBS.log for more detailed error messages that may help identify the issue.
5. Use DISM Commands: You can also try running the following DISM commands to check the health of the image:

      DISM /Online /Cleanup-Image /CheckHealth
      DISM /Online /Cleanup-Image /ScanHealth
   

If these steps do not resolve the issue, consider looking for more specific error messages in the DISM log files, which can provide further insight into what might be going wrong.

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References:

• DISM API Troubleshooting
• Fix Windows Update corruptions and installation failures