1
Look at the Function Keys (F1 - F12) on your keyboard, id one of those keys has a touchpad icon, try pressing that key or Fn + that key to see if that toggles on the touchpad.
2
If not, start your laptop, just as Windows attempts to load (spinning dots), press and hold Power Button for 5 - 10 seconds to perform a Hard Shut Down
Do this twice
On the third start Windows will boot into the Recovery Environment and from there you can access System Repair, Safe Mode, Command Prompt... etc.
Please try each option one at a time, then see if the touchpad is working on your laptop.
1
Go to Troubleshoot - Advanced Option - Startup Repair
See if Windows startup can repair itself
2
Go to Troubleshoot - Advanced Option - System Restore
Check to see if you have a restore point you can go back to dated before the touchpad problem started.