I have recently upgraded my vista machine to windows 7 home premium. The whole thing worked after the upgrade apart from for hamachi (edition 1). After uninstalling and reinstalling of that and it resolved it, except for I had two hamachi network interfaces listed in device manager, single of which was turn up as not working (yellow exclamation mark). As the whole thing was functioning I left it alone. I attempted to upgrade hamachi to hamachi 2. Appeared to work okay however I could not connect to any peers.I open device manager and found that was only one hamachi NIC listed furthermore it was the not working one. I after that manually installed an additional instance of the hamachi network adapter. Hamachi at a standstill cannot connect to peers - similar error message regarding the network adapter.