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FolderRisk: Caution

DISM C:\Windows\Logs\DISM

Folder for the DISM tool logs (dism.log), which trace Windows image servicing operations online and offline.

Updated on By AltF4 Formation

What it’s for

DISM (Deployment Image Servicing and Management) writes its dism.log to %windir%\Logs\DISM by default. Microsoft describes it as the primary log of all DISM actions, online and offline. The /LogPath option redirects the file, and /LogLevel sets the detail level.

What it contains

  • dism.log: trace of DISM commands, for example /Online /Cleanup-Image /RestoreHealth, and their results.
  • Pointers to CBS.log, where the detail of an online servicing failure lives.
  • Possibly other files, depending on the tools that rely on DISM.

Risks and best practices

  • To analyze a DISM error, read dism.log and then CBS.log, which it points to. Keep both until the diagnosis is over.
  • For a scheduled or automated operation, /LogPath keeps its logs apart from those of other runs.
  • If the volume is short on space, archive then purge, as administrator.

Useful commands

Fenêtre de terminal
# Last lines of dism.log
Get-Content "$env:windir\Logs\DISM\dism.log" -Tail 50


# Repair with a dedicated log file (as administrator)
DISM /Online /Cleanup-Image /RestoreHealth /LogPath:C:\Temp\dism-restore.log

Folder contents

Logs 1

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