Q: Is it possible to make iTunes my default media player in Windows XP?
A: Assuming your Windows XP installation is up to date with at least Service Pack 1 or greater, doing so is easy.
From the Start menu, navigate to “Control Panels” and select the “Add/Remove Programs” option. Then, select the “Set Program Access and Defaults” panel. Here, you can choose to configure a “Custom” setup in which you can change the “Default Media Player” to iTunes, and, if you wish, disable access to Windows Media Player altogether.
We’d certainly do the former, but disabling access to Windows Media Player altogether may be a bit extreme, as iTunes cannot play certain file types such as MIDI, WMA, WMV files.