I have recently setup a small wireless network with a few machines and my wireless internet keeps dropping out

Check to make sure that each new or existing computer in the wired/wireless network has a different computer name.

Identical computer names will cause the router to malfunction causing multiple IP’s being assigned to the same ‘computer name’.

Also be sure to check that each computer on the network has a unique IP address, as IP address conflicts will cause your router to malfunction.