Here is a list of troubleshooting steps to take if your laptop’s touchpad is not working after a software update:

1. Check device settings and re-enable the touchpad.
2. If problem is not resolved, try a soft restart by pressing and holding down the power button for up to 10 seconds.
3. Inspect the touchpad for any signs of physical damage.
4. Run system diagnostics to check for errors.
5. Verify that your laptop is running the latest version of its operating system.
6. Uninstall and reinstall the touchpad drivers.
7. If all options fail, you may need to consult a technical professional for more assistance.