How to install Microsoft MPEG-4 V1/2/3 VKI Codec :
- Unarchive MicrosoftMPEG4.zip, right-click on MPG4VKI.INF file and choose Install.
- You may encounter a prompt saying: "The software you are installing for this hardware... has not passed Windows Logo testing..."; click on the Continue Anyway button.
- Then check the installed codec. See Checking Installed VIDEO and AUDIO Codecs In Windows XP guide.