Hi ScallOway. I'm Greg, an installation specialist, 10 years awarded Windows MVP, and Volunteer Moderator. If you will work with me I will be here to help until the issue is resolved.
If you don't remember your password then you can try to change the password here:
https://support.microsoft.com/en-us/help/402683...
But unless you have a phone number already set up to send a code then you may not be able to do this, instead need to do Account Recovery which is a process that takes up to 30 days so they know for sure it's you:
https://support.microsoft.com/en-us/help/17875/...
You can try adding a fresh email and phone number as Alias and then set one of those primary, but I've never heard of it doing this without wanting your present password to verify it's you doing this. https://support.microsoft.com/en-us/help/12407/...
It's really a PITA to forget your MS Account password, probably better to start over fresh with a whole new account you can set up here, then choose a password you can remember so you don't have to go through this again:
https://support.microsoft.com/en-us/help/402632...
I hope this helps. Feel free to ask back any questions and keep me posted. If you will wait to choose if I resolved your problem, I will keep working with you until it's resolved.
________________________________________________________
Standard Disclaimer: There are links to non-Microsoft websites. The pages appear to be providing accurate, safe information. Watch out for ads on the sites that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the sites before you decide to download and install it.