Antivirus apps whats available and what works.

Hi i have been testing the several antivirus apps here on portable apps in this list click here

1. calm win: seems to update virus definitions ok. and scan system. what i noticed is that it does not seem to do anything with detected viruses.
2. HijackThis Portable: again great scanning ability. but detects things that are not viruses. when checking the app and clicking analyse this button it gives error of not being connected to internet and i have to manually check them myself online.
3. McAfee Stinger Portable: this seems to be good updating and scanning. (not sure if it deletes or quarantines files) but it does a great job otherwise.
4. Spybot - Search & Destroy Portable: again a great application does what it says it will. comparable to the standard version. detects cleans and destroys anything it finds.

thanks for any ideas and tips you may have in relation to these issues.