Originally Posted by ScottC
You can ignore that warning. It's Microsofts way of telling you that it's an "unsigned" application. Everything except for Microsoft applications are unsigned.
Good summary...a bit off-topic, but I just find it amazing how Microsoft uses security fears for anti-competitive measures. I helped someone install some programs today and she (computer novice) would never have dared to ignore these warnings...which basically means she would never dare to install anything non-Microsoft!