How to Fix “Windows Cannot Start This Device (Code 19)” Error

The Code 19 error is a common issue that Windows users may encounter, especially when using peripheral devices like DVD drives, keyboards, mice, or other connected devices. This error typically arises due to registry conflicts, preventing the device from starting properly.

Causes of Code 19 Error

The primary reason for this error is a conflict or corruption in the Windows registry settings related to the specific device. Common triggers include:

  • Installing or updating device drivers;
  • Installing or uninstalling software that affects device functionality;
  • Software conflicts that modify registry keys.

Methods to Fix the Code 19 Error

1. Restart the Computer

The simplest first step is to restart your computer. Sometimes, a basic restart can resolve the issue, allowing the device to function correctly.

2. Restore the Registry

If restarting doesn’t help, try restoring the registry by following these steps:

  • Press Win + R and enter regedit to open the Registry Editor.
  • Navigate to: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class.
  • Locate the specific key for your device, then delete the UpperFilters and LowerFilters entries if they exist.

After making these changes, restart your computer.

3. Update or Reinstall the Driver

Incorrect driver installations can also cause the Code 19 error. To update the driver:

  1. Open the Device Manager by pressing Win + X and selecting it from the menu.
  2. Find the device with the error (marked with a yellow triangle).
  3. Right-click the device, then choose Update driver or Uninstall device to reinstall it afterward.

4. Use System Restore

If the problem started after a recent driver update or software installation, try rolling back the system to a previous restore point:

  • Open the Control Panel and search for System Restore.
  • Follow the prompts to select a restore point from before the error occurred.

5. Run a Virus Scan

In some cases, viruses or malware can modify registry keys, leading to the Code 19 error. Run a full system scan using reliable antivirus software.