Online Armor Free
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Full user review
"Excellent two way Firewall."
Used it on my XP system for several years and now on Windows 7,
without problems. Easy to install and use for a non technical user,and
has features more advanced user may like.
Once set up it soon becomes more or less "set and forget..
None .It has been problem free, and reliable.
Seems to be consistently among the top three free firewalls in independent reviews.
It has never failed me on either of my PCs,so I personally can recommend
it,as a reliable and easy to use firewall (even for non technical users, such as myself.)