Did your trackpad work before the USB (re)installation?

Looking at a screenshot of the keyboard on your laptop (well, similar - I suspect your “36U4” is because it has a Slovakian keyboard and/or power plug), the FN + F10 appears to enable/disable your trackpad.

Try pressing your “FN” key + your F10 key and see if that re-enabled your trackpad. You may just need to press the F10 key alone too - not sure which is the “default”, the “special function” or the “F” number function.

You can tell if you need to press the FN key or not, by tapping on the F2 or F3 or F5 or F6 key. These control your volume and screen brightness and you should see a visual indicator of the volume level going up/down or brightness going up/down.

If you needed to hold down the “FN” key to change you volume or screen brightness, then you’ll need to do the same before pressing the F10 key.

Good Luck!