Is there any way to alternate to a different driver to connect to the internet? (If on Ethernet, try WiFi and vice versa)
I ask since the Hamachi virtual adapter laches on to the physical adapter, and I want to see if maybe the network adapter itself might be causing this odd issue.
You have relayed everything appropriately, but I figured I'd expand on everything in case there were any steps that may have been missed.
I'm sorry if it seemed like I was reiterating stuffs you already knew though :S
I would also suggest updating the actual network adapters themselves just in case.