How do you stop the arrow key from moving scroll while playing a game
The issue may be that something may have been pressed on the keyboard by accident which caused the scrolling. You can stop this annoyance by pressing F7. If F7 does not work you also have the option of pressing the function key which is FN.
The game may be set to sensitive for the mouse pointer. Go under options and check the sensitivity settings. If this is a mouse with a the center wheel as scroll it can stuck.