Can I replace the whole keyboard base?

I have attached an external keyboard to get Ctrl key and ofen type the entire shortcut if on leftside of keyboard (aliexpress about $5, $11 for backlit). That keyboard on top of box over my mouse. Box is so mouse space is never blocked. I doubt that replacing builtin keyboard will fix. A Windows update broke it years ago they worked couple of months this year (2025) then failed definitely after a windows fix, would think bad drivers. Toshiba no longer makes laptops and Windows 10 no longer supported.