On my laptop, certain buttons are no longer working?

I have the following problem:

On my laptop, the keys "R, T, B, 6," no longer work.

Unfortunately, I do not know how to fix it, so just ask here

Have read on the internet you should update the keyboards drivers, but I'm only told that the driver is up to date.

I thank you once and wish you a nice day.

In such cases, the contacts of the individual keys are ailing. This is more of a problem of the hardware, not the software. If the keyboard can't be replaced by a professional, I would connect via USB an external keyboard.

Times BE CAREFUL with compressed air between the crevices blow, possibly there crumbs or so accumulated. Not too hard, otherwise the keys will fly away!

if that does not help, in general, the keyboards of the devices can be relatively easily replaced…

Honestly. Beer, cola. Something came on it.

Driver is the total nonsense.

Has always worked.

Unscrew the thing and clean the keyboard with a cloth soaked in spirit.

Never add liquid directly.