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Why the window key in keyboard?
Each laptop allow to remove its keyboard, go through the manual how to, remove the keyboard. Usually each key can be removed too, make sure that you know how to... Remove each key and clean with clean water, dry it before installation. Clean the keyboard body with slightly wet tissue, dry before installation.
It's on the far right of the keyboard known as numpad and also there are number keys above the alphabets on your keyboard.
turn your keyboard upside down to drain liquid off. Then use a danp cloth to clean surface.
The lowest key on a standard piano keyboard is the A0 key, which is the first key on the left side of the keyboard.
The "Return" key is the "Enter" key. It is usually the largest key on the right of the letter keys on the keyboard.
Get a new keyboard
keyboard
it's an "At" key or an "At sign" also known as "Commercial At"
If your keyboard is missing a key, press the key-less spot very lightly when used, or try to place the key back on, or at best get a new keyboard.
COMPUTER KEYBOARD KEY MEANINGS
To make an apostrophe on a keyboard, press the key beside the "enter" key on the right hand side of the keyboard.