uninstalled and installed again, but no help, hamachi2 not working anymore. I gues configuration files and accounts is in "c:\WINDOWS\system32\config\systemprofile\Local Settings\Application Data\LogMeIn Hamachi\"? Deleted everything from there, but no help. Afther reinstalling Hamachi2 still the same error. Whats wrong? I gues - big bug. At least hamachi1 works :( LogMeIn Hamachi 2.0 Tunneling Engine service is started.