Code 41 Error Message
The Code 41 error is one of several Device Manager error codes. The Code 41 error will almost always display in the following way:
"Windows successfully loaded the device driver for this hardware but cannot find the hardware device. (Code 41)"
Details on Device Manager error codes like Code 41 are available in the Device Status area in the device's properties: How To View a Device's Status in Device Manager.
Important: Device Manager error codes are exclusive to Device Manager. If you see the Code 41 error elsewhere in Windows, chances are it's a system error code which you should not troubleshoot as a Device Manager issue.
Cause of the Code 41 Error
Error Code 41 Troubleshooting
- Restart your computer if you haven't done so already.
There is always the remote possibility that the Code 41 error you're seeing was caused by some temporary issue with Device Manager. If so, a simple reboot might fix the Code 41.
- Did you install a device or make a change in Device Manager just before the Code 41 error appeared? If so, it's very possible that the change you made caused the Code 41 error.
Undo the change if you can, restart your PC, and then check again for the Code 41 error.
Depending on the changes you made, some solutions might include:
- Delete the UpperFilters and LowerFilters registry values. A common cause of Code 41 errors is the corruption of two registry values in the DVD/CD-ROM Drive Class registry key.
Note: Deleting similar values in the Windows Registry could also be the solution to a Code 41 error that appears on a device other than a DVD or CD drive. The UpperFilters/LowerFilters tutorial linked above will demonstrate exactly what to do.
- Reinstall the drivers for the device. Uninstalling and then reinstalling the drivers for the device that's experiencing the Code 41 error is a likely solution to this problem. If the device is currently removed, be sure to uninstall the drivers before reinstalling the device and then its drivers.
Note: Properly reinstalling a driver, as in the instructions linked above, is not the same as simply updating a driver. A full driver reinstall involves completely removing the currently installed driver and then letting Windows install it over again from scratch.
- Update the drivers for the device. It's possible that installing the latest drivers for the device could fix the Code 41 error. If this works, it means that the Windows stored drivers that you reinstalled in Step 4 were likely corrupted.
- Replace the hardware. A problem with the device itself might be causing the Code 41 error so you might need to replace the hardware.
It's also possible that the device is not compatible with this version of Windows. You can check the Windows HCL to be sure.
Note: If you're sure that a hardware problem isn't causing this particular Code 41 error, you could try a repair install of Windows. If that doesn't work, try a clean install of Windows. I don't recommend doing either before you try replacing the hardware, but you may have to give them a try if you're out of other options.
Please let me know if you've fixed a Code 41 error using a method that I don't have above. I'd like to keep this page as updated as possible.
Still Having Code 41 Issues in Device Manager?
Let a community of computer support enthusiasts help out! Post the details of your problem in the PC Support Forum. Be sure to let us know that the exact error you're receiving is the Code 41 error in Device Manager. Also, please let us know what steps, if any, you've already taken to try to fix the problem.