If you're trying to uninstall Hamachi v1, and are encountering the error message :
I found a solution to this problem :
- Download Hamachi v 0.9.9.9 (not Hamachi v2)
- You can find it on the internet archive
- You can also find copies of it out on the internet : http://www.google.com/search?q=HamachiSetup-0.9.9.9-en.exe
- Install Hamachi v 0.9.9.9 over your existing Hamachi installation
- Choose the existing Hamachi directory (e.g. C:\Program Files\Hamachi) for the installation
- After installing Hamachi 0.9.9.9, don't launch it.
- Now Uninstall Hamachi 0.9.9.9 either through the link in the start menu or add/remove programs
- This will fully remove Hamachi.