Connectify setup shows looped error

Hey,

When I upgrade my connectify to latest version I get this error often. As per the error message, I tried to un-install the previous version and I try to reboot the new one. It is acting a loop, again and again I am getting this same error. How to get rid of this loop error? Help me to fix this error, makes me frustrated.

Your help is great.

Error message:

Connectify Setup

A previous run of the Connectify installer requested a reboot to complete. Please reboot your computer before running the installer.