A family of Microsoft word processing software products for creating web, email, and print documents.
I think this key will have a different appearance on different keyboards (my Das keyboard has a Das logo instead of Windows), and the Wingdings version is probably representative enough. Alternatively, character 87 in the Marlett font is also a Windows icon. The one you want is contained in another font you may be unlikely to have: see https://cdsmythe.com/2019/how-to-create-a-keyboard-shortcut-to-insert-the-windows-key-symbol/.