How to Fix Code 39 Driver Error

by Kefa Olang

A code 39 is usually a driver error that prevents your CD or DVD-ROM drive from being displayed. It alerts you that a communication error has occurred and the ROM drivers are either corrupt or missing. A code 39 error can be caused by a number of reasons including the presence of malicious files, or registry problems. Regardless, a few simple troubleshooting steps and guidelines can solve this error and allow you to use your ROM drive.

Using Device Manager


First try updating the driver in the Device Manager. To do this, click the Windows "Start" button and right-click "My Computer."


Click the "Properties" to open the System Properties window. Click the "Hardware" tab and click the "Device Manager" button.


Scroll down and identify the CD or DVD-ROM drive with a yellow exclamation mark.


Right-click the drive once you have identified it and click "Update Driver." Follow the guided prompts to update the drive and restart your computer when the process is complete. If that does not solve the problem, move to the next section.

Using the Registry


Click the Windows "Start" button and click "Run."


Type "regedit" (Without quotes) and press "Enter" to open the registry console.


Click the "HKEY_LOCAL_MACHINE" folder on the left panel and click "SYSTEM." Click "CurrentControlSet" and click "Control." Click "Class and click the "{4D36E965-E325-11CE-BFC1-08002BE10318}" key. Delete the following entries if they exist under this key: LowerFilters, LowerFilters.bak, UpperFilters, UpperFilters.bak.


Click "File" and click "Exit" to close the registry console. Restart your computer.


Double-click "My Computer" on the desktop after your computer has restarted and verify that your CD or DVD-ROM drive is visible. You should also check the Device Manager again to see if the exclamation mark has been removed from your CD or DVD-ROM drive.


  • close Run frequent virus scans on your computer and delete detected malicious files. If you do not have an Antivirus program consider AVG (see Resources) which is both free and effective.


About the Author

Kefa Olang has been writing articles online since April 2009. He has been published in the "Celebration of Young Poets" and has an associate degree in communication and media arts from Dutchess Community College, and a bachelor's degree in broadcasting and mass communication from the State University of New York, Oswego.