This paper  explores the use of the DISM offline mode in addition to the use of dism /online  /cleanup-image /restorehealth in online repairs. In this guide we will show you how to use  dism.exe and dism.exe /online /cleanup-image /restorehealth in offline mode to fix Windows  systems that will not boot.

Use Offline DISM in the following cases: Offline mode  is most suitable when a system will not start or there is no network access. You will require a  bootable Windows installation media or recovery drive.

Offline DISM Syntax Use the following format  for offline repairs:

dism /image:D:\ /cleanup-image /restorehealth  /source:D:\sources\install.wim

Replace D: with the appropriate drive letters for your  offline Windows installation and ISO files.

Best Practices

• From the recovery environment, always check  the drive letters.
• When possible, choose install.wim instead of install.esd.

Conclusion Offline repair  using dism.exe is a lifesaver when standard boot or internet-based recovery fails. This command is  crucial for any repair work and should be learned by anyone.