A few months ago Dish sent me a replacement 722 because of a hard drive failure in my original 722. Since then I see a 722 and a 722K on my Win 7 home network. When I view properties for each device, the serial number and MAC address of the 722 match the replacement 722. However, the serial number and MAC address for the "phantom" 722K do not match any device in my house. The MAC address for the 722K also does not match either the Home Plug or Ethernet MAC addresses in the 722. My network is 100% wired, no wireless. Always has been. I do have two neighbors with Dish but they both have 722's as well. Given I don't use wireless it would appear that it's not one of those boxes connecting my the network. I did a lookup on the 722K MAC address and it shows it is assigned to Dish Network. I have a table of MAC addresses for every device on the network and the 722K MAC doesn't match any of those either. Finally, it doesn't matter whether the 722 is on or off, the 722K MAC address appears on the network. Any thoughts about where this is coming from? Thanks.