0x800f0915 error

Error 0x800f0915 means DISM cannot find repair content for the Windows image. In this situation, use DISM with an explicit repair source, then rerun SFC, and if problems persist, consider a reset.

Follow these steps:

1. Open an elevated Command Prompt
   • In the search box on the taskbar, type command prompt.
   • Right‑click Command Prompt and select Run as administrator.
2. Run DISM with a repair source
   • Mount or connect a valid Windows 11 installation source (for example, a Windows 11 ISO or USB that matches your installed build as closely as possible), or use another working Windows installation or a WinSxS folder on a network share.
   • Run a command in this form (adjust the path to your actual repair source):

          DISM.exe /Online /Cleanup-Image /RestoreHealth /Source:C:\RepairSource\Windows /LimitAccess
     

   • Replace C:\RepairSource\Windows with the folder that contains the Windows image files.
   • Wait for the command to complete.
3. Run System File Checker again
   • In the same elevated Command Prompt, run:

          sfc /scannow
     

   • Wait until verification reaches 100% and check that it reports no integrity violations.
4. If corruption is still reported
   • View the SFC details in C:\Windows\Logs\CBS\CBS.log and manually replace specific corrupted files with known good copies, as described in the System File Checker guidance.
   • If SFC still reports unrepairable corruption after DISM with a valid source and manual replacement, use Reset this PC with Keep my files to reinstall Windows while preserving personal data.

References:

• Use the System File Checker tool to repair missing or corrupted system files
• Using System File Checker in Windows
• System File Checker finds corrupt files after installing KB2821895