I'm going to leave this installed for a while and I may try it on the next computer I clean up. I just hope they keep this free version available.
The uninstaller will leave the resident shield startup in the Run section of the registry should you uninstall it - well at least it did on my PC. Of course an install watcher like ZSoft Uninstaller can get rid of it, or if you didn't monitor the installation CCleaner will also detect it in an Issues scan - other than that I have zero complaints about PC Tools AntiVirus Free Edition.