I've got a deskjtop and a laptop and a DLink router. they were all linked happily a couple of years ago and still have their ip addresses. The desktop is hard-wired to the modem. the laptop has a wireless link. I've just upgraded both machines to windows 7 and am trying to link them. Windows media player can see each machine from the other, but Windows Explorer can't. I'm on the desktop, I go into full network map. I can see the desktop linked to the modem, via a question mark. I can see the laptop linked to the modem directly. The modem is linked to the internet. I'm on the laptop, and there's no sign of the desktop. Just the laptop, the modem and the internet. I've got a folder on each machine which is set to shared. I've got a shared printer on the desktop. But I can't see any shared folder or printer from the other machine. But I can ping each machine, and I can play Windows media player from each - on the other. Can you please tell me what i'm missing.