Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
I think I have found the solution sort of.
I saw something that said Microsoft had launched CoPilot and it was free to the primary account holder, I have a 5 user licence but I was using the one email account for both computers, my daughter had a different email account for her shared copy she isn't having problem.
I set up another Microsoft account uninstalled Office completely from my computer then reinstalled it, Now I have office on the backup computer with the problem still there, and Office using the new account on the main coputer with no problems
The sort of comes from the fact if you only have a single site licence you have CoPilot whether you want it or not, which from what I have read is causing problems with Uni Students, they are failing Modules & exams (or whatever they are called now) because they are using AI which aparantly is an automatic fail in somecircumstances.