And Welcome to Linux Questions.
We'll need a little more information to help you.
Your in a dual boot and have Windows 7 and Linux Mint 14. Got it-
Congratulations on the Linux Mint Installation.
Did you install Linux Mint on a Desktop computer or a laptop?
If a laptop what kind; Lenovo? Toshiba? Sony Vaio? Asus?
What kind of processor do you have; a dual core (Intel) or a quad core? And RAM or Memory?
If you don't know I can look up your computer and read the specifications to find out.
. but the wifi thing I don't know what to do about at all
It might be that all you need is a driver but I'm not sure yet. We will need those questions answered when you have time.