Windows 10: After installing KB4562900 updates select keys not functioning

After running windows 10 1903 update KB4562900 Cumulative Update Preview for .NET Framework on 30th July few of the keys have stopped working. The keys 0, 9, o, l, ., up down right left keys are not functioning. Uninstalled the quality update and even tried to uninstall from Advance Options but after uninstalling the update, again it had installed two other updates KB4560960 and KB4565633. The windows application log show the event 'The program explorer.exe version 10.0.18362.959 stopped interacting with Windows and was closed. Log Name: Application Source: Application Hang Date: 30-07-2020 19:37:11 Event ID: 1002' exact during the time the key blocking issue start to show up.

When tried to update the Standard PS/2 keyboard driver from the Device Manager it show 'The best driver for the device are already installed' message. Even after all this the keys are still not functioning.

:)

 

After installing KB4562900 updates select keys not functioning

Even the keyboard troubleshooting show the message nothing need to install as all work fine. So with all this got that the issue possibly could be due to windows incorrectly mapping the keyboard post running the july 21, 2020-KB4562900 cumulative update review for .NET Framework. Some suggest removing the kbdcass in the registry and it did not fix the issue.

After repeat 'uninstall device and restart' was able to manually select and install the driver and even that did not fix the problem.

 

After installing KB4562900 updates select keys not functioning

After running windows 10 1903 update KB4562900 Cumulative Update Preview for .NET Framework on 30th July few of the keys have stopped working. The keys 0, 9, o, l, ., up down right left keys are not functioning. Uninstalled the quality update and even tried to uninstall from Advance Options but after uninstalling the update, again it had installed two other updates KB4560960 and KB4565633. The windows application log show the event 'The program explorer.exe version 10.0.18362.959 stopped interacting with Windows and was closed. Log Name: Application Source: Application Hang Date: 30-07-2020 19:37:11 Event ID: 1002' exact during the time the key blocking issue start to show up.

When tried to update the Standard PS/2 keyboard driver from the Device Manager it show 'The best driver for the device are already installed' message. Even after all this the keys are still not functioning.

 

After installing KB4562900 updates select keys not functioning

Successfully uninstalled those updates still the keys are not functioning. Could not locate the actual problem area. Any proven method to enable back those blocked keys that caused due to these kinds of issues.