i Ingrid i have the same problem have you get any answer to this mater? ill
apprichiate your help´

I cannot guarantee that my solution will work for you but please try this
solution (which works for Win XP SP2) and let me know how you got on.

 1.. Open My Computer
 2.. Go to Tools | Folder Options
 3.. Click the View Tab
 4.. Select "Show Hidden Files and Folders"
 5.. Check "Display Contents of System Folders"
 6.. Uncheck "Hide Extensions for Known file types"
 7.. Uncheck Hide Protected Operating Systems Files"
 8.. Click OK

Then:-

 1.. Navigate to C:\Documents and Settings\All Users\DRM
 2.. Rename the DRM folder to DRMBACKUP
 3.. In the Registry Editor (Start | Run | regedit), delete the following
subkeys:-

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\DRM

HKEY_CURRENT_USER\Software\Microsoft\Windows Media\WMSDK\General

 4.. Reboot your PC
 5.. In Control Panel click "Add or Remove Programs"
 6.. In the left Panel click "Add/Remove Windows Components"
 7.. Uncheck "Windows Media Player" & click Next
 8.. When done return to 6 above and check "Windows Media Player" & click
Next

Windows Media Player should now function correctly.

Good luck,

Stan Kay