Event ID 15 is logged in the System log when you run Ntbackup on a Windows Server 2003-based computer

When the "Devices: Restrict CD-ROM access to locally logged on users only" local security policy is enabled on a Windows Server 2003-based computer, and you start Ntbackup, the Removable Storage service may log an error entry in the System log that resembles the following:

The Removable Storage service's access to the CD drive is restricted because of the security policy and therefore logs the error message. The Removable Storage database is not corrupted, and you can safely ignore this message.

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

For more information about Ntbackup, please visit the following Microsoft TechNet Web site: For more information about a similar problem when you connect a USB device to a Windows Server 2003-based computer, click the following article number to view the article in the Microsoft Knowledge Base: