Firewall is the first line of defence and also for the high speed surfing or low speed surfing it is a must so have to block the unwanted invisible to hackers and
to help protect it from destructive trojans and
It helps to block ha ckers , hostile event protection and torzan protection this is available in the free version and one commercial version with added advantage of smart recommendations, auto update and upgrade and internet fraud protection.
See this picture to know more.
A firewall provides essential protection for your computer by locking intruders out.
System Requirements for AOL Firewall Basic
Windows 98, ME, 2000, or XP
PC with 486 or higher processor (Pentium recommended)
5 MB free hard-drive space