Lenovo x120e keyboard works not properly

I have a Lenovo x120e, I bought a couple of years. Last Friday, I started to have problems with the keyboard. The first question was that the computer was save my CTRL key was pressed continuously. A single reboot did not fix this. However, by using the onscreen keyboard, I could get the computer to recognize possibly CTRL key was indeed not and my keyboard seems to work correctly again.

However, from Sunday, I started having new problems and have not been able to solve. Specifically, the keys g and h do not work (although sometimes, if the onscreen keyboard is up as well, they will register as 5 and 6, respectively). Other keys around the Board work not (apostrophe, 5 and 6, some function keys). The on-screen keyboard works perfectly fine, as does a USB keyboard (I currently use).
I tried the following, and none of them have helped:
(1) virus and malware scan - nothing came (analysis complete, not just "fast")
(2) check the performance of the equipment (an OEM utility) - no problem
3) updated keyboard driver
(4) uninstalled and reinstalled the keyboard driver
5) restore to a restore point Windows before initial issue last Friday
(6) restart in Mode safe without the attached external keyboard - same keys always had the same problems.
So now I wonder if it's a hardware problem or a software (driver or OS) one. As I see it, my two possible options are:
(1) If a problem with the hardware, at least try to clean and if necessary replace the keyboard
(2) the software, wipe the computer and reinstall Windows. All my data is stored externally, while it would be annoying, is not a major issue to do this.
I want to just make sure you choose the right course. Someone saw in which of them is most likely necessary remedy. Or if I missed a possible way to fix this without one of these last ditch effort, I would be grateful for more information.
Thanks to you all.

Hello Andrew,.

I would agree that it's a hardware problem. At the same time, if you want "good" do an OS reinstall, you have nothing to lose but some time and effort.

Kind regards

BearPup

Tags: Windows

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