Keyboard Still Not working On CF-SV7

I bought the laptop about two years ago and it came with the keyboard broken

I reinstalled windows, then they are a lot of drivers missing

I dont know but one day the keyboard works just work fine

So because of that I thought it will be best if i do a complete overhaul (reinstall windows without bloat and install the latest bios from the website)

And the keyboard just does not work anymore

So i decided to buy a new keyboard (its really expensive)

And the same exact issue happen the same key does not work

I tried everything cleaning the ports install bunch of drivers

But device manager still have a lot of missing driver

Even though i already install all the available driver on the website

At this point im crying man i been trying to make this work for a long time and i need it for university urgently

I dont have any money to buy a new laptop

Any help ??