How to Fix: "Device Drivers Not Signed" Error

The "Device Drivers Not Signed" error occurs when installing drivers that lack a digital signature, especially on Windows systems. This issue may appear when connecting new hardware or updating drivers that haven’t been certified by the manufacturer.

Reasons for the Error

  • Lack of Digital Signature: Windows checks for a digital signature on drivers to ensure system security.
  • Outdated Driver Version: Sometimes manufacturers don’t update drivers, or they might be unsigned.
  • Security Policy: Recent Windows versions enforce stricter digital signature verification for drivers.

Solutions to Fix the Error

There are several methods to bypass this issue and install unsigned drivers.

1. Disabling Driver Signature Enforcement via Boot Menu

This method involves starting Windows in a special mode:

  1. Restart your computer and press the F8 key (or another key, depending on your computer model).
  2. Select the option Disable Driver Signature Enforcement.
  3. After Windows boots, try installing the driver again.

2. Using Command Prompt

You can also use Command Prompt to temporarily disable signature checks:

bcdedit /set nointegritychecks ON

To re-enable signature checks, run:

bcdedit /set nointegritychecks OFF

3. Installing Alternative Drivers

Try finding signed versions of the drivers on the device manufacturer’s official website. Certified and updated drivers are often available there.

4. Enabling Test Mode

Test Mode allows you to install unsigned drivers:

bcdedit /set TESTSIGNING ON

Don’t forget to disable Test Mode afterward by using the command:

bcdedit /set TESTSIGNING OFF