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In reference to Online Armor, CNet had a couple of poor reviews and one mentioned that it was hard to remove if (and when) required.
http://www.download.com/Online-Armor-Personal-Firewall/3000-10435_4-10426782.html?tag=lst-1&cdlPid=10989958
Other than this comment, it sure looks like the app is fine by others ratings. Thanks to all for the info and personal experience.