Here are some links that deal with this error.http://groups.google...f6895569e7f5dfahttp://groups.google...60c24baee3cb448http://groups.google...d4b688666c7c84chttp://groups.google.....tible+encoder
An alternative is to install WMP 11.
Or you could try SFC (System File Checker).
It can fix certain issues in Windows where specific system files get corrupted, deleted, or infected. Basically the System File Protection watches the system files and checks their integrity against it's knowledge of what these files are supposed to look like. Generally if a system file get's "messed with" windows will let you know and give you the option to dissallow the change, sometimes you don't get this option though. The System File Checker is a command line utility that will initiate a scan of all the system files to make sure they are in their original state, present on the system, and or working properly. It's an easy tool to use but the user HAS to have an XP disk for it to work.
Do you have a valid XP cd?
If so, place it in your CD ROM drive and follow the instructions belowStart > Run > cmd
then typesfc /scannow (note the space)
let this run untill you get a message saying it is complete.SFC
- system file checker, retrieves the correct version of the file from %Systemroot%\System32\Dllcache or the Windows installation source files, and then replaces the incorrect file.