I found a way to keep Hamachi and maintain your internet speed while you are not using it.
Go to Services (Windows Search Bar: services.msc) and look up for LogMeIn Hamachi Tunneling Engine, disable it and restart the computer. It worked for me, if I need to use Hamachi again I'll enable it just for the time being. This way at least you won't have to format the OS.
Hope it helps! Is not the ultimate solution but it works.
Go to Services (Windows Search Bar: services.msc) and look up for LogMeIn Hamachi Tunneling Engine, disable it and restart the computer. It worked for me, if I need to use Hamachi again I'll enable it just for the time being. This way at least you won't have to format the OS.
Hope it helps! Is not the ultimate solution but it works.