I am currently using the lastest version of hamachi and starting it causes a message to appear "Failed to connect to engine". After getting that, I went to the service thing and tried to manally start the engine and I get : "Windows could not start the Logmein Hamachi Tunneling Engine service on Local Computer. Error 1068: The dependency service or group failed to start." This was an issue since last month and started when I lost power during an update I beleive.
You just need to iniciate the service called: "Management instrumentation tester. make windows"
1. Press Win+R and type "services.msc"
2. Go to that service called: "Management instrumentation tester windows" (is something like this, im brazilian i dont know how it is written in English windows version.)
3. And after it go to logmein hamachi service and start it
After a long long time I could resolve my problem, i hope you can resolve it too.