C:\Documents and Settings\UserName\Local Settings\Application Data\Microsoft\Windows Media\11.0
Right-click the Wmsdkns.xml file, and then click Properties.
Click the Security tab, and then select the user account that you use in the Group or user names list.
The permissions of the user or group that you selected are shown at the bottom of the dialog box. Make sure that you have Modify permissions for the Wmsdkns.xml file.
If you logged on to the computer by using an account that does not have the necessary permissions, close the session, and then try again by using a system administrator account, or by using an account that has permissions to modify this file.
If you are not sure, contact your system administrator.
Delete the Wmsdkns.xml file. After you delete it, Windows Media Player will re-create the Wmsdkns.xml file. To do this, follow these steps:
Locate the following folder.
Note You must enable the Show hidden files, folders, and drives option on your computer to show the folder. For more information, see the Show hidden files section.