Proper way to reinstall / upgrade

Hey. I’m upgrading from Comodo’s free AntiVirus to the Internet Security Complete. I’m on a pretty fresh Windows 7 64bit system and I dont want to mess it up.
Whats the proper way to upgrade?

I thought of:

  1. Uninstalling Comodo Antivirus via Revo Uninstaller (cleans the leftovers)
  2. Restarting
  3. Running the clean-up batch file
  4. Cleaning the registry with Iobit Advanced SystemCare Pro
  5. Restarting
  6. Installing Comodo Internet Security Complete

Am i right? I hope this method works as supposed. Any thought, ideas?
Thanks: Xelo

You can start the installer again and tell it to install the firewall too. You can find the shortcut to the installer under the Start button of Windows.

Yes that should work, but in most cases merely uninstalling it via its own uninstaller is enough. It’s up to you whether you want to go to all that work.