Hi. I'm David, and I'm happy to help you.
Please clarify the following:
Which procedure did you use to reinstall Windows?
Did you perform a clean installation using an installation media (USB flash drive), completely erasing the system drive before reinstalling? Or did you reset the PC?
During the reinstallation, did you use the laptop keyboard and touchpad, or did you use the USB ones?
Also, perform this test:
Access your laptop's BIOS (usually by repeatedly pressing F2, F10, or Del immediately after turning it on).
Check if the touchpad or internal keyboard is disabled in the BIOS.
I await your reply.