hello.. I recently installed windows 7 on my laptop. One day I was messing around with the network and sharing settings by changing it to a Home network so I could see all the computers/devices connected to my network. Also I was changing permissions on some folders to allow sharing. I have a wireless network and I'm running a linksys router set up to only allow certain MAC addresses to get on my network. The only ones allowed were my PS3, my desktop computer and my laptop, all running wireless. Well, just a couple days ago I noticed when I viewed the full network map, I saw something very odd. It showed my laptop then a solid line from my laptop going to something else which was listed as "Uknown Name" and from that it showed a line going to my router. My desktop computer showed up as well but it just showed a line going from my desktop computer to the router. When I viewed the full network map on my desktop computer, the "unknown name" device or whatever it was didn't show up. Only when I viewed the full map on my laptop it would appear. Also, it wasn't my PS3 because I had it completely powered off so it wasn't connected to the network. I'm kinda worried that maybe someone got access to my network/laptop computer? Any thoughts?