Windows 10 keyboard doesn't work but works if only after screenkeyboard is launched

Hi on a dell latitude laptop with Windows 10, for a specific user account keyboard doesn't work after the login screen. But it starts working back only when we launch on-screen keyboard application. And it also continues to work even after we close the on-screen keyboard. So far we've tried to uninsall keyboard driver but this didn't solve our problem. And nothing suspicious on system start. Any help is appreciated.

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