I use an mp3 playing software that first copy selected mp3 from mapped drive of C:\ and then play with the relevant mp3 player. But before opening the file it displays the packager notification that should it be opened or not.
This message always appears when I attempt to open an mp3 file with the help of mp3 software.
I also mention that this message was not appeared when I used XP with service Pack-1. After installing Service Pack-2, this problem occurs.
