Since Windows 11 was available for upgrade I did it. After two days of cumulative updates, the notebook's inbuilt keyboard becomes unresponsive at login screen, after several resets now keyboard/touchpad/touchscreen all become unresponsive at Windows Login screen, while external mouse & keyboard are working.
I did hard reset, clean install of windows 11, hardware diagnostic at BIOS and within HP Assistant - all are pass. Keyboard is working at BIOS / Startup / Booting, only once reaching at Windows Login screen become unresponsive. I try uninstalling them at Device Manager several times but no benefit. Only clean install brings back them to normal functioning, but within another 2 days the problem comes back.
I understand it must be the software issues with Windows 11 upgrade, but after clean install going back to previous windows version option and HP recovery become unavailable.