I have a computer, reinstalled windows, and now internet doesnt work wat happened????

Question

the computer is hooked up to a wireless router which is hooked up tp a DSL modem (westell Model 6100)......but! ! ! ! i have another computer ive been reinstalling windows and the internet works perfectly...its just this one computer that doesnt work....any help...i need it fast....

Answer 1

u might of forgot to get rid of the first program of windows before you reinstalled this newer version.  

Answer 2

use manual of that westell modem and go step-by-step...

Answer 3

make sure that computer has wirless capabilities, then make sure the settings in your computer match the settings of the router, if not change them