I also had this problem with a clean Windows XP Professional with SP2. So I looked in the sourcecode and found the problem in the file wpi.htm (themes\classic, I used the classic theme btw). Go to line 78, delete from the OnClick values: After deletion, line 78 should be : Save and run WPI. Now, when you'll disable the audio player in the options, you won't get the error when trying to instal. Have fun, SWoJup guy@rozendorn.ath.cx