Wireless internet having problems with multiple computers
 

I have Comcast with a D-Link wireless router, first off. Second off, I've been having horrible problems connecting all my computers to my wireless router.

I keep getting an error that says that my desktop and my laptop have the same IP address so both computers aren't able to acess the wireless at one time. I didn't think that was possible. I tried toggling around with some of the IP settings but I have yet to fix the problem. This is probably an easy fix or something, but I'm rather unfamiliar with wireless settings.

Also, sometimes when I connect to my wireless, it boots my girlfriend's computer off the net as well. Any solutions to these problems?

What did you try with the IP settings? Did you try to give each computer it's own static IP address?