Unknow Device Showing on Network

[jgrimmster]

As you can see from the screenshot on imgur, a device recently began to appear in my network. I assume the device named Jennings-PC is a wifi enabled device that is being detected by some node om my network. Any one else experiecned similar issues or know how to prevent it from appearing?

My network is secured using WPA2, the device is not associated with the router in any way.

http://i.imgur.com/4Qf1E.jpg

 

[2xg]

Welcome to SF,

Try to Power Cycle your Devices and see if the mysterious device shows up again.
How to Power Cycle (Reset) Your Modem and Router | eHow.com

If you're certain that the Device doesn't belong to you, you may block the MAC Address from your Router setting.

 

[jgrimmster]

As I stated, the device is not associated with the router. I presume it is being detected by one of my wireless nodes. I have investigated the suspect computer on my network that I believe to be detecting it, but I see no way of preventing it. I have never experienced anything like this before.