Thank you Krishna.
I cleared cookies and cache on my google (default) browser as suggested. Attempted to login to my McAfee account with no success again, it failed on username and/or password.
I then switched to Microsoft Edge browser which worked, I was able to login to All Access McAfee account, download and installed successfully. Afterwards I was able to log in to my All Access McAfee account on my google browser. So its all ok now.
I suspect an inconsistency, when I uninstalled LiveSafe, because I hadn't registered the product before it was uninstalled. Therefore there was no associated McAfee email and the inconsistency only applied to the default browser (google).
Thank you Krishna it's fixed now I believe.