Computer experts only.DVD won't play in Windows Media Player etc

I have just installed a dvd drive on my pc and I want it to play in wondows media player.

I have media player classic and it plays it and I have power dvd 5 and it plays it.

Here is the error message I get from windows media player,

Windows Media Player cannot play this DVD because there is a problem with digital copy protection between your DVD drive,decoder and video card. Try installing an updated diriver for your video card.

I get a similar message in Real Player.

This is my video card info I think.

Intel® 82845G/GL/GE/PE/GV

I am running Windows XP and Windows Media Player 11
Real Player is 10.5

If it is the driver ,I can’t find an update for this one.

I do have MPEG-2 decoder software on my computer or my Power DVD 5 and Media Player Classic wouldn’t play my DVD.

Anybody help please!
Thanks in advance.

Welcome to CDF’s

I cannot answer your question as i don’t know your definition of Computer Expert.

But looking at what does work and what doesn’t work should tell you want are good programs and which are crappy. VLC is another good one and free.

what is VLC please be specific and thank you for your reply

Click for VLC.

but i want to play it through windows media player

http://www.microsoft.com/downloads/details.aspx?FamilyId=DE1491AC-0AB6-4990-943D-627E6ADE9FCB&displaylang=en

run this utlility

i have already ran this program