The last new computer I bought had Win XP and I remember that by default it set itself up insecurely - i.e. with a single admin account. It was a battle to change it - and I knew what I was trying to achieve. An ordinary person would have had no chance.
I don't know if about Windows 7 and later were the same.
By clicking on the User Name, you will requery the forum for that user. You will see everything that he or she has posted with that Mudcat name.
By clicking on the Thread Name, you will be sent to the Forum on that thread as if you selected it from the main Mudcat Forum page.
By clicking on the Subject, you will also go to the thread as if you selected it from the original Forum page, but also go directly to that particular message.
By clicking on the Date (Posted), you will dig out every message posted that day.