This is more of a blanket try-it answer than a question...
I had a problem with my Predator 317 and the "Z" key. My issue was the "Z" key only. Everything else worked. I tried the filter key trick and that did work for one night but was dead again by morning. I uninstalled drivers and everything else. I knew it had to be programmatic as for one, it was only the "z" key and two, the filter keys thing worked for a while. I am also old and don't see well all the time. I also have a cat that is a pita. So I got thinking that between my fat fingering and the cat, perhaps a key combo got tripped and it jammed something up programmatically. I tried alt+, Fn+, win+ "Z". When I finally hit ctrl+z the key started working again. So far, so good. So try all those things to maybe toggle back something you may have fat-fingered and/or caused the software to jam. I only had one key issue, but it may work on others.
//Edited the content to add model name.