A family of Microsoft word processing software products for creating web, email, and print documents.
If this is the cursor you're seeing, it's intended for moving the program's window to a different place on the screen. You
might have gotten it by pressing the Alt key and the spacebar together, releasing them, and then pressing the M key. (The Alt+space shortcut opens the "system menu" from the little program icon in the top left corner, and M is the letter that selects Move
in that menu.)
To get rid of it, just press the Esc key.