Lenovo Ideapad's SHIFT producing characters, Caps&NumLock issues

Brand new laptop. Model is Lenovo Ideapad 110-15ACL, Windows10 Home.
Pressing keyboard’s LEFT hand side shift key button automatically produces characters 48TY] in MS Word document. In addition to this production of 48TY] left hand side shift key button press launches ‘spelling and grammer check’ if shift key is pressed in MS Word document OR it launches ‘find application’ with 8TY] automatically appearing in the ‘find what’ text box if shift key is pressed in notepad. In HTML/Web doc, LEFT shift key launches ‘find application’ with 8TY] automatically appearing in the ‘find what’ text box & turns CapsLock On automatically.

Pressing keyboard’s RIGHT hand side shift key button automatically produces characters Z*cx but doesn’t launch any application such as ‘spelling and grammer check’ if shift key is pressed in MS Word document OR it produces characters ‘z*cx + whatever was last copied in the clipboard’ if shift key is pressed in notepad & in HTML/Web doc.

Shift key button is also physically ‘shifting/moving right’ the text it is automatically producing, similar to the ‘shifting/moving right’ effect of the Tab button. It seems like some pre-programmed macros, key sequence commands, etc are running in the system.

Some keys in the keyboard are behaving erratically e.g. the CapsLock key automatically producing unpredictable effects, NumLock key switching/turning OFF automatically etc.

Control panel's Keyboard setting shows 'standard PS/2 keyboard;This device is working properly.' Tried changing Win10's 'Time&Language settings'-Current settings Language:English UK,Keyboard UK Querty. In BIOS, I have disabled the 'Hotkey'. Went to ‘Control Panel\All Control Panel Items\Language\Advanced settings’, tried changing the settings in the ‘change language bar hotkeys’, 'change key sequence' etc but the problems remain. 'Changing key sequence' sometimes make CapsLock/NumLock On forever(no toggle possible ).

Could you please suggest all possible solutions including Win10 registry changes, device manager changes, disabling of hidden macros, hardware/software setting changes etc.