Greetings
Firstly thanks for replying and supporting me to sort the issue.
This was nothing to do with the OS. However, said that, TPM was the culprit.
How I realised...
- Rolled back from windows 11
- When roll back completed, I still had the same thing.
- Did a full format with windows 10, and now have left the dev channel and joined the release channel so the PC doesn't download and install windows 11.
Remember....
When you're doing a full reset to disable/enable TPM in your bios.