How can i ins tall my rangemax dual band wireless-n router wndr3300 to my laptop to setup wifi in my house

Connect your router to computer with ethernet cable.
Then access it with following link.
http://192.168.1.1 or
http://1921.168.0.1

type user name as "admin" and password as "admin" or blank or "password"

Then configure your router as WEP.
Then go to wireless and check that wi fi is enabled.

Then go to wi fi security and add WEP key it is your password to connect your wi fi.
Also enable dhcp if you want get ip auto to computers.
configure your wan settings as your internet service provider like dns ip addrses.
Then save settings and restart the router.

Now go on your laptop first turn the wi fi switch on your laptop .
Then check that your wi fi network adapter driver is proeprly installed.Also check in my network places that your wi fi is enabled.
Then double click on wi fi icon and click on "View wi fi networks."
then connect then enter password which you set in router wep key.

Let me know if you need more assistanse.
Thanks.