There is something weird with the alert sound. I have 3 computers. Optiplex 3020, Optiplex 3060 et Latitude E5570. I have a little mp3 sound file that work with VLC on the three computer. The portfolios are the same on the three computers. But... the sound work fine on the Optiplex 3020. It does not work on the 2 others ones. It does not work either with the testing button on the alert editor. The difference between the Optiplex 3020 and the two others : Optiplex 3020 is on windows 7, the two others are on windows 10 version 20H2. The list of sound files in the alert editor are not the same on the Optiplex 3020 and the one on windows 10.