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SYMPTOMS
When a user logs off a Windows Server 2003-based computer that is running Terminal Services, Index.dat files may not be deleted on the server. This problem occurs even though the "Delete cached roaming profiles" Group Policy setting is enabled.

CAUSE
This problem may occur if the following conditions are true:
A user logs off a Windows Server 2003-based computer that is running Terminal Services after the administrator installs Microsoft Internet Explorer 6 or Internet Explorer 6 Service Pack 1 (SP1) on the server.
The "Important URLs & Favorites and Links" Windows Server 2003 Group Policy setting is enabled.
Cached profile folders are created but are not deleted because three Index.dat files cannot be deleted in three different subfolders. Therefore, every time that a user logs on and logs off, new folders are created on the terminal server. These folders are created for each user in the user_name, user_name.000, user_name.001 format. These folders quickly fill the terminal server's available hard-disk space.

RESOLUTION
Hotfix information
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Windows Server 2003 service pack that contains this hotfix.