Brand new Dell system. WAV's moved from my old xp system and they worked fine there. What I do. 1. click start/control panel/personalization/sounds 2. Select the sounds tab 3. pick an event sound 4. select browse and browse to the WAV I want. Double click it and it shows as selected in the sound window. 5. hit the play button to test it and it won't play The selected WAV is shown as the sound for the event but I get no sound from it. Dell tech support tried to tell me it needed to be an MP3... I tried to move the default file in the media drawer and insert a renamed WAV. Windows tells me I need to be logged in as an admin (I already am, only account on the machine). I toggled UAC off and then I didn't need to be an admin but it told me I need to be a trusted installer.