ctrl key stuck

weird issue that's been going on for years but is getting worse. Sticky keys aren't turned on. CTRL key keeps sticking. If I repeatedly tap the CTRL key it fixes it for a while. I bought a new keyboard, problem persists. Borrowed another keyboard, problem persists. Spec...

i got a Lenovo T420 laptop which was working fine until today, for some reason it things that the control key is pressed down. Every time i press the backspace button it inputs { , space dosent work and many other keys. I tryed using a linux usb but the problem still presists. I've also tryed to...