Hi Michael Higgins,
Welcome to Microsoft Q&A forum. I'm happy to help.
The issue "DISM" command stuck at 62.3% is not really an issue. "DISM" command with "/Online" parameter indicates that "DISM" will use online resources for its task, while the progress 62.3% indicates that DISM is currently downloading resources. This progress highly depends on your internet connection, so please be patient.
There's another option is running an In-place upgrade, it's easier to track how the progress is going.
Disclaimer: Let’s try performing an in-place install or in-place upgrade which will refresh your Windows files and operating system without removing files or applications. That being said, we always recommend that if you have important data, you should back it up before making large system changes. If you want to back up your data first, please do so. Once you are done backing up, you can follow the steps in the following guides: How to run In-place upgrade in Windows 11 - Microsoft Community
If you have any further questions, please don't hesitate to let me know by "Comment".
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