I'm new to the forum so hello!

I'm having various problems with Vista that I can't figure out how to resolve.

1. When clicking on a hyperlink in any office product it gives me the error "The operation has been cancelled due to restrictions in effect on this computer. Please contact your system administrator". Obviously I am the system administrator..... Anyway I thought it may have something to do with the UAC so turned it off which did not help. Then I thought it may be a restriction in a policy but couldn't find any with this restirction (there are a lot to look through so I may have missed it) but still having this problem. I had it when first using Vista then it stopped doing it and I could click any link and it would allow me to go to it but now its back and I have no idea what i changed to stop it in the first place nor why it is back! This also happens if I click a hyperlink in a Word document i.e. clicking a link to take you somewhere else in the document also brings up the same restriction.