WMP 10, no video during DVD playback

This has probably been answered a hundred time but here goes:

Installed Intervideo DVD XPack codecs, WMP 10, Intervideo WinDVD Platinum Ver 4.5 -WinDVD no function, WMP 10 plays DVD without video.

System info:

Athlon 1700+ MSI K7T266 ver 2.0
512 RAM
Asus 7700 Pure GeForce2 32meg
Emprex 1008i DVDRW

This system used to play DVDs flawlessly until installed WMP9, then was intermittent. After installing WMP 10, no video only sound. XPack codecs cost $14.95 for NOTHING!! seeking refund…Help!! :confused:

what about windvd7? 4.5 is very very old
you can try vlc http://www.dvbskystar.com/download/vlc-0.8.2-win32.exe