I've tried installing Hamachi a few times, including just after boot before starting up any apps. I always get the message:
[Setup] ended prematurely
[Setup] ended prematurely because of an error. Your system has not been modified. Run the installation again later.
Click Finish to exit the [Wizard].
At first I thought it might be because I didn't create a web account beforehand, then I read it's not necessary for a simple VPN usage. I have no idea why it won't install. (At least it doesn't fail part way in the installation, and I have to manually uninstall, like with HSS.)