How to Fix Code 19

by Alexis LawrenceUpdated September 28, 2017

Code 19 is a Windows system is a code regarding incomplete or damaged registry information. This code appears when trying to start a connected device, such as a DVD drive. The code will advise you to uninstall and reinstall the device on your system. This is one correct course of action, but you will only need to uninstall the device if deleting the filters doesn’t work.

Delete the Upper and Lower Filters

Go into the registry of your computer. The registry is accessed through the “Start” menu. Type “regedit” into the search box and hit “Enter.”

Find the registry entry that reads “HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class{4D36E965-E325-11CE-BFC1-08002BE10318}.” Click on this entry to highlight it.

Choose “UpperFilters” from the options in the right-hand pane. If an entry appears under “UpperFilters,” go to the “Edit” menu and choose “Delete.” When the warning message comes up, confirm that you want to delete. Do not delete anything if no entry comes up under “UpperFilters.”

Select “LowerFilters” from the options in the right pane. If an entry appears, delete it. When the warning message appears, click “Yes” to confirm. If there is no entry under “LowerFilters,” do not delete anything.

Restart the computer. Once you have deleted the upper and lower filters, you will need to restart the system for the changes to take effect.

Uninstall and Reinstall the Device

Open the Windows “Device Manager” on your computer. To access this feature, open the “Start” menu and go to the “Control Panel.” “Device Manager” will appear under the “Hardware” section of the “Control Panel.”

Locate the device that is not working in the list of devices. All of the devices currently hooked up to your computer should be listed under their respective categories. For instance, if a DVD drive on your computer is not working, click the plus sign next to “DVD/CD-ROM drives” to show all of the available drives on your system. Right-click on the drive that won’t open and choose “Uninstall” from the list that comes up.

Confirm that you would like to uninstall the device. A warning message will automatically pop-up when you choose to uninstall. When you confirm that you would like to uninstall, the device will be removed from the system.

Restart the computer. As long as the device is still connected to your computer as it restarts, the computer should recognize it and it will be reinstalled automatically with all of the necessary drivers and components.


Be careful working in the registry of your computer. Deleting the wrong file can applications or programs on your system to stop working.


About the Author

Alexis Lawrence is a freelance writer, filmmaker and photographer with extensive experience in digital video, book publishing and graphic design. An avid traveler, Lawrence has visited at least 10 cities on each inhabitable continent. She has attended several universities and holds a Bachelor of Science in English.

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