Forum Discussion
DISM Headache
It started out as a mission to update my secure boot certificates. I made some progress using powershell and got the certificates onto my windows install, but they didnt get written to the firmware....
DISM online relies on Windows Update or the Microsoft Servicing stack to fetch necessary files.
If DISM can't contact MS servers, it won't be able to repair or mount images, and this should ideally be reported early.
Running for hours without clear failure messages wastes time and causes confusion.