If your laptop's built-in mouse (trackpad) is not functioning while an external mouse is connected, there are a few things you can check:
- Check Device Settings: Sometimes, the built-in mouse can be disabled in the settings. Go to your laptop's settings and check if the touchpad is enabled.
- Driver Issues: Ensure that the drivers for your laptop's touchpad are up to date. You can check this in the Device Manager under "Mice and other pointing devices".
- Function Key: Some laptops have a function key (often labeled with a touchpad icon) that can enable or disable the touchpad. Make sure it hasn't been accidentally turned off.
- Windows Settings: In Windows, you can adjust touchpad settings by going to Settings > Devices > Touchpad. Make sure the touchpad is enabled there.
- Hardware Issues: If none of the above solutions work, there may be a hardware issue with the touchpad itself. In this case, you may need to consult a technician.
By following these steps, you should be able to troubleshoot the issue with your laptop's mouse not working when the external mouse is not available.