Hi darkblue,
1. Which version of Hamachi are you trying to install? Did you have a previous version installed? If yes, which?
2. Which OS are you trying to install it to?
3. Please send the logfile C:\Windows\ServiceProfiles\LocalService\AppData\Local\LogMeIn Hamachi\h2-engine.log to hamachi-feedback@logmein.com
Regards,
DVZs