We have recently found that those individuals who are seeing this error message are all using World of Warcraft's Curse Client.   

If you are using the free version of Curse Client, we recommend that you uninstall this program, add HumminbirdPC to your computer and then re-install Curse Client.

If you are using the paid version of Curse Client, you may need to set up a new user on your PC with admin rights and under the new user, install HumminbirdPC.