Windows OneCare (as well as Vista) have two-way firewalls, unlike XP’s one-way firewall.
The OneCare team found out that a bunch of people had been turning off their firewall and decided to find out why:
Based on our investigation, there are four primary reasons people are turning off their firewall.
- Do not think a software firewall is necessary
- Do not like the (sometimes incessant) pop-up dialogs
- An application failed to install with firewall turned on
- An application fails to work with firewall turned on
More here.
Alex Eckelberry