Laptop Keyboard disable steps in case you have usb external keyboard

If we uninstall drivers after restart windows install it automatically

So following is trick

Go to My Computer→Right Click→Properties→Device Manager→Keyboards

Under keyboard option,Right Click on the keyboard you want to disable

Click on properties

In Driver tab click on update driver

Select browse my computer option

Select below option and click on next

 Uncheck-”Show compatible hardware”

Select other manufacturer than yours

Select any model and click on next

Message will appear-”Driver updated…”

 Restart and enjoy..

PS: In case you miss your in built keyboard then follow the same process again.