Keyboard is malfunctioning

[Sylvester Asuenimen]

Good morning community. I have Lenovo T450. Recently, the keys seem to be malfunctioning. If l press the capsLock, for instance, it will be typing small letter and vise-visa. When l press down the shift key it will be typing letter on the lower case rather than letter on the upper. This challenges started with sticky key appearing on the screen whenever l boot my system. Please how can I set the keyboard? Thank you for your answers. Sylvester Asuenimen.

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