Some keys are not working dell inspiron

One day, idk when, i tried to alt-tab but it worked weirdly - like if i hodled alt and spammed tab key. Day later tab key didn't work. Also not only tab. 

 

LSHIFT, Y, T, BACKSPACE, CAPSLOCK... And some others didn't work. I wasn't happy. I found out that other people had the exact same issue. Things that i tried:

Uninstalling and installing keyboard driver

 

Trying to update all drivers ("all drivers are up to date")

 

Cleaning my keyboard 

 

Reebooting

 

Using screen keyboard (that actually worked)

 

Trying to type something on my Kali Linux

 

Waiting for it to pass

 

Screaming in anger

EDIT: i can get service tag, but I'm unable to do this in a next few days, so I'll provide some of my system info

 

 

OS: WINDOWS 8.1 also Linux, but on USB

 

AGE: about 3 - 5 years

 

No viruses, that's the only issue.