
After booting your computer from the Windows 10 installation media, press SHIFT + F10 keys at the first install screen to launch Command Prompt.Ģ. How to fix: Error 50 DISM does not support servicing Windows PE with the /Online option. In fact the /Online switch in DISM tool, specifies that the action is to be taken on the operating system that is currently running.

The above error is occurred, because in WinRE the operating system is not running, so the /Online switch is useless at this case.

This tutorial contains instructions to resolve the following error when running the DISM command "Dism.exe /Online /Cleanup-Image /Restorehealth" from the Windows Recovery Environment: "Error 50, DISM does not support servicing Windows PE with the /Online option".
