If your external keyboard is not recognized after restarting your laptop, try the following steps:

1. Ensure that the keyboard is plugged into a working USB port and is securely connected.
2. Restart your laptop.
3. Ensure that the laptop keyboard is enabled through your laptop’s settings.
4. If the keyboard still isn’t recognized, try a different USB port or restart your laptop again.
5. If the keyboard still isn’t recognized, try a different port or restart your laptop a third time.
6. If the keyboard is still not recognized, you may need to install the latest drivers for the keyboard.
7. If the above steps do not resolve the issue, your external keyboard may be defective.