This could be down to a faulty codec, or it could be that the media files themselves have been mooved.
What does the error message say in windows media player?
nigglesnush85- thanks for the reply
When I try to open a file with WMP, it says this:
"Windows Media Player cannot access the file. The file may be in use, you may not have access to the computer where the file is stores, or your proxy settings may not be correct."
The files themselves haven't been moved, as I am the player directly from the file. How could I check on the faulty codec?
If anybody has any other ideas please let me know...