Hi,
If the steps provided by Q&A Assist did not work:
Go to Control Panel > Hardware and Sound > Mouse. Check if there is a Synaptics touchpad control panel; you should see an option to disable it (often marked with an 'X').
Alternatively:
Check your laptop keyboard. One of the keys from F1 to F12 should have a touchpad icon on it—try pressing it to re-enable the touchpad. If that doesn't work, try pressing the Fn key + the key with the touchpad icon to see if it starts working again.
If that still doesn't help, please search for "msinfo32.exe" in the search bar, take a screenshot, and post it here so we can identify your specific laptop model or desktop configuration.
Thanks