Why does the keyboard itself hold down the Back space and D keys?

Question

Keyboard

The keyboard started typing on its own.
And when you press the connect button (pressing the button on the clave itself), the keyboard connects to the PC in which the receiver is located and starts typing (clamps) two backspace and d keys (there used to be a figure eight)
To stop you need to press any other key - then the keys are pressed (eight, d and backspace).
But they don't push.
All other keys work.
Keyboard MS Ergonomic keyboard 7000

Answer 1

To understand whether this is a software or hardware problem, connect the keyboard to another PC.
Most likely it will be the same. Then either replace or repair. This happens if the keyboard was flooded.