Windows 10: One key has severe input lag but every other key is fine

I know its not a hardware problem because the Virtual Keyboard displays the same input lag when pressing the @/' key on UK keyboard layout.

I already reinstalled both Keyboard Drivers several times and enabled/disabled filter keys.
I also changed the input language to Australia and US layout, and in both of those there is no input lag but the @ key on UK layout is " on US and Aus layout so I cant use it. I removed the UK layout and re-added it after restarting but the problem is still there.
(By layout I mean the input language)

Moreover, by input lag I mean the key doesnt work when it is tapped once like all other keys do, but it works after long pressing it for over 2 seconds resulting in: @@@@@@@@@@@@ or '''''''''''' output

please help

:)

 

Random lag spikes

Hi,

We would like to know more about your lag issue:

• What browser are you using when you experience a lag?
• Does the lag occur in a particular game?

In the meantime, we suggest you run the System Maintenance troubleshooter. Here are the steps:

• Press Windows Key + X.
• Click on Control Panel.
• Select Troubleshooting.
• On the left pane, click on View All.
• Click on System Maintenance to run the troubleshooter.

Looking forward to your response.

 

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