The most POPULAR software for removing DRM protection:

WM RECORDER
the easiest audio/video stream ripper

WM CAPTURE - Super high quality on-screen video recorder.

SOUNDTAXI
remove DRM protection from Windows Media, iTunes music and video files

Other RECOMMENDED software and services:

• AUDIO/VIDEO STREAMING CAPTURE SUITE
  the best audio/video stream recording/capturing bundle
• REPLAY MUSIC
  the best streaming music recorder
  
  
• REPLAY MEDIA GUIDE
  free service to find and record online radio, Internet TV, podcasts
• AVS VIDEO TOOLS
  convert, split, join, remove commercials, edit, rotate, apply effects, capture, transfer, copy, rip and burn DVD and video files
• EMUSIC
  the best legal music download service
• AUDIBLE
  download audio books, audio magazines, newspapers, radio programs

IndivBox.key will be downloaded from microsoft server at the first time you try to play DRM protected media. Or if it is already downloaded before, then you should delete the DRM folder ( C:\Documents and Settings\All Users\DRM ), 'coz IndivBox.key needs to be downloaded again.

It depends on what version of media player you use, but not actually version of media player. It will detect runtime file in your system, if you have clean install of Windows XP and never update/upgrade your media player and never applied media player's hotfixes, it will download IndivBox.key v10.00.00.3646 to your C:\Documents and Settings\All Users\DRM

By default, clean install of Windows XP will install windows media player 9, then when you attempt to play drm file for the first time, media player will ask you for a security upgrade.

After you have finished a security upgrade and IndivBox.key has been downloaded to your drm folder, please check what version of your IndivBox.key.


How to individualize your system for the first time?
1. Delete the DRM folder C:\Documents and Settings\All Users\DRM (Attention: All you licenses will be deleted.)

2. Go to:
services.wmdrm.windowsmedia.com/indivSite
and click upgrade.