Hello Mick,
Thank you for posting your query on Microsoft Community.
From the issue description, I understand that you want to change the email address of Microsoft Account. I will certainly help you with this issue.
However, before we proceed I would require some more information to assist you better.
Are you able to login to in Windows with Administrator account?
If you need to change the email address associated with the user account, then you should have administrator account then you have to switch the login account to “Local user account”. Then switch back to Microsoft account and provide the desired Email
ID to that user account.
To do so, please follow these steps given below:
Step 1: Switch to local user account:
Follow these steps to create a “Local User account”.
a. Press “Windows key +W” key.
b. Type “users” without quotes in the search box.
c. Then select “Users” from the left panel.
d. You will get an option “Switch to a Local account” right below your user account name.
e. Select “Switch to a local account” option.
f. Enter the required details.
g. Then login to the local account and check how it works.
Step 2: Switch back to Microsoft account
Follow these steps to create a “Microsoft account”.
a. Press “Windows key +W” key.
b. Type “users” without quotes in the search box.
c. Then select “Users” from the left panel.
d. Select “Switch to Microsoft account” right below your user account name.
e. Enter the required details (Primary Email ID).
f. Restart the computer and then try to login using new Primary account.
Refer to the link for additional information.
What is a Microsoft account?
http://windows.microsoft.com/en-IN/windows-live/sign-in-what-is-microsoft-account
User accounts: Frequently asked questions:
http://windows.microsoft.com/en-ca/windows-8/user-accounts-frequently-asked-questions
Hope this information is helpful and do let us know if you need further assistance. We’ll be glad to assist.
Thank you