Hello kirbster 1,
Welcome to Microsoft Q&A forum.
DISM run into a halt at 62% (the exact percentage might vary) actually is quite common, even in public released version, which might not always mean your DISM is having issues. Before proceeding, can you please help do a check first?
- Leave the DISM running, don't interrupt it.
- Open PowerShell as administrator.
- Type Get-Content C:\Windows\Logs\CBS\CBS.log -tail 10 -wait and press Enter.
- Watch the PowerShell screen, if it still adding lines in a regular basis, DISM is actually still working and that tell that you need to wait for it to finish.
Please let me know if there are any updates.