Hello.I've recently got some updates from my windows and since then my keyboard's keys work different(or dont work).First my left ctrl key,4,5,9 & 0 keys(not from the numpad) didn't work at all and then i got some more updates and when i press my left ctrl it mutes the sound,when i press the left alt key opens up the search menu and when i press the window key it shuts down my pc.Pls help i'm using these keys very often and it stresses me out ((