Many new laptops are wireless ready. The computer should have a program for a wireless signal if it is equipt for that.

I am not computer savy at all but I installed my own wireless router very easily.

I have a Netgear which works great. My office computer doesnt have wireless capacity so I bought a small receiver which plugs into a USB jack.
My laptop, Mac mini and Wii haver their own wireless reciever so it connects with no extra gadgets.