Okay,I just figured this out. Go to Run>services.msc>Look for LogMeIn Hamachi Tunneling Engine>Right-Click it>If it dosen't let you start Go to properties after right click and change the start-up type to manual and then apply>ok.Then on the left sidebar click start.Hope this helps!
I know how to fix it!!! after ours of trying all of the things people were telling me to do NONE of them had worked for me... what you need to do is uninstall the hamachi program. once this is done you much now reinstall it WITH A PREVIOUS VERSION the software will then be installed and updated on its own and you will be able to run hamachi once more :D