I don't know what happened exactly, but I'm not able to open my links in the same window anymore (tabs). I could create tabs manually but whenever I launch a favorite, it opens up in the same window. I checked the advanced options in IE7 and also the settings tab, but don't know what's wrong. They are all correct from what I see.
I'm using Windows Vista Ultimate and IE7 works properly in my other account. The account having the problem is the FULL/True Administrator account.