Office 2007 outlook e-mail restrictions

When I receive a e-mail from anyone with a link and try to access the link, I get this message - this operation has been cancelled due to restriction in effect on this computer. Please contact your system administrator. - This is a home computer, there is no system administrator. I must have changed a setting, but I have tried for 2 days to find the problen, no luck!!!

Could you PLEASE tell me what & where I made this change...thank you --

Login in your system as administrator.

Start Menu > Control Panel > Select Add Remove Programs >
In Add Remove Program on the left handside you will the option Program Access and Defaults. There you will see configuration which is currently selected change it to some other browser make you sure.. Click Ok. Try to test the link in outlook.