- UnInstall K-LITE CODEC PACK
- UnInstall ATB's CODEC PACK
- Download the Officail MPEG-4 CODEC:
http://www.divx.com/
http://www.3ivx.com/
- Install Windows Media Player 10 and replace the "Advanced MP3 CODEC" with "Professional MP3 CODEC":
Copy C:\WINDOWS\SYSTEM32\ l3codecp.acm C:\WINDOWS\SYSTEM32\ l3codeca.acm