The correct alternation code for ? is ALT+0153.
So, hold alt and press 0,1,5, and 3 on your keyboard, it'll create a ?. Unless suddenly, laptops started shipping without alt buttons.
Welcome to eGO's CS:S, hope you have fun.
Laptops can't do alt codes because they do not have number pads (or whatever they're called) on the right side of the keyboard.
ACTUALLY Laptops do have the numberpads, most newer from a year or 2 ago come with a full standard keyboard include numpad on the right
