Here are a couple of links that come with when "Googlin" that error message:
Some Multimedia Titles Do Not Work on HP Vectra Communication
http://support.microsoft.com/kb/q132661/
Plus a link to a previous discussion about this topic on CNET which you did not respond to..There are suggestions already there:
Watching a dvd?
http://reviews.cnet.com/5208-6142-0.html?forumID=45&threadID=123570&messageID=1400451
Hope this helps.
Grif
I am receiving the following "Windows Media Player Error message" when trying to use my CD drive on my computer.
"MMSYSTEM 262 There is a problem with your media device. Make sure it is working properly or contact the device manufacture."
I'm using Win98, Avast AV, and Zone Alarm.

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