There are a few things you can do to see if you can get your laptop touchpad working again:

1. Check to make sure the settings of your touchpad driver in Device Manager are correct and up to date.
2. Check in your system settings to make sure the touchpad is enabled.
3. If necessary, clean the touchpad if it is dirty or gummy.
4. If a hardware issue is suspected, connect a USB mouse or pointer device to check if it is responding.