How do I add a second laptop and X-box to my existing wireless network? The second laptop is showing limited connectivity when trying to connest-but I cannot connect it at all. The X-box is working wireless, but the connection is horrible
Limited normally means you aren't pulling internet but you have an IP address handed out by the router.
Since you connected the xbox, I'm guessing it's not a wifi password issue.
You might try giving the laptop a static IP and see if that fixes the issue.
You mirror all settings on another working computer, excpet give it a different number on the end. Choose something like 10 more than how many devices connect to your router. Say you have 4 devices, and this is the 5th one. Give the laptop x.x.x.14 Usually the pool is 2-50 so that should work.
What's the xbox's distance from the router? Is there any thing that might block the signal in between the router and xbox?