Password Needed For Internet Explorer

I can get online though Chrome or I would not be posting this message but ever since I bought my present computer off a guy that had a computer shop which has now closed down and is something else it asks me for a supervisor password to connect to any site on the original Internet Explorer browser which is a content adviser. As I never use the old one now I didn't bother about it but it's getting annoying. I got winamp but it is now asking me for that password to browse the radio stations. The only clue it gives me is that the password hint is :inty: which I don't know what it means. If I cancel it the message just says navigation to the webpage was canceled. If this password is common I was just wondering if anyone who is experienced like John a super moderator I've seen on this forum would know. If it's one the owner of that shop set is there any way I can find out what it is or would only he know?
 
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