WMP issues with wmv files streamed or via the internet

Hi, we had a problem with a short webcast for a few clients and decided to check further as to what the cause could be.

When viewing the web page with the embeded windows media window, on some client, the wmp would not start to load the stream.  I have tried changing from a download stream via http to actually putting it on mms://

If we select properties of the player window, on a pc that works, it shows the url, and the stream details, codecs etc.  On a PC that does not work, it shows just the stream URL, nothing else.

If the file is played locally, then it is OK, but if we run WMP and do File, Open URL then its the same as before, WMP just sits there failing the connection.

It does seem to be more the win7 64b PC that have the problem, but its not limited to win7, or even all win7 clients.

Some sites that worked before, do not work for these clients, so the site coding, wmv encoding is not an issue.

renaming the %localappdata%\ media player 12 folder does not help.

On some, resetting IE settings to default allowed the streams to play as normal.  

Any ideas on what could be going on?
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Davis McCarnOwnerCommented:
Are the Users Power Users or Local Admins on their PC's?
What firewall/antivirus software is being used?
metroitAuthor Commented:
All local admins, some domain members, some just stand alone, firewalls in different states, on, mixed, off no difference to the client.
Davis McCarnOwnerCommented:
I run into numerous XP systems where ICS is running (though; in a limited form) and is shown as the Internet Connection in Network Connections.  Either remove it in Add/Remove or try this: http://support.microsoft.com/kb/303275

Hits on Windows 7 say to also check the network options in WMP.

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metroitAuthor Commented:
Thanks, whilst its a good find, its not the answer as some of the clients are not running any firewall at all.

The network options in WMP are for methods to connect to an mms: source.  The embeded media that we had a problem with was a direct file link via http://server/path/file.wmv

Resetting the IE settings to defaults seems to fix it for most clients, so its not FW related.
Davis McCarnOwnerCommented:
"1.Open Windows Media Player.
2.On the Tools menu, click Options.
3.On the Network tab, make sure that the appropriate check boxes are selected (Multicast, TCP, and HTTP)."
metroitAuthor Commented:
as my answer above, those settings are for MMS streams, this issue affects mms and file download streams.  But yes, I had already checked there.
Davis McCarnOwnerCommented:
//server/path/file is a direct stream.  Adding http: in front of it invokes your browser first which is very different.
Are there any events in your event viewer?
metroitAuthor Commented:
no errors at all, the wmp errors out saying it can not connect to blah blah..  

additionally it says can not connect to media, file not found.
metroitAuthor Commented:
Accepted the post to enable me to close this, its been a week now with no further ideas on what the actual fault is.
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