Thank you so much.
I was going insane. I tried all the previous solutions in the thread, but none worked for me.
My problem started when I used a USB mouse on my laptop. Right after that, the touchpad was not working.
For anyone with the same issue in the future, I disabled the HID/compliant system controller that the picture shows and uninstalled the 12 HID Device. After restarting the laptop, the touchpad was working again!
Also, it may be a stupid comment to add, but the first time I tried this, it didn't work because I still had the USB mouse connected to the laptop. The whole thing should be done without it!
Once again thank you so much