what are firewalls for?

Giganews Newsgroups
Subject: what are firewalls for?
Posted by:  HONOREDANCEST…@YAHOO.COM
Date: 28 Dec 2006

I was listenening to Kim Commando on the radio, and she said that if
you have a computer without a firewall, a antivirus program, and an
antispyware program and you go online for a few minutes, your computer
will be filled with spyware and viruses.
How does this happen?  How can these files be dumped on your computer
over the internet?

Also: One thing I notice is that I frequently get a message in a little
white window at the bottom of my screen, saying that "files have been
upgraded, click here to install".  Just what am I installing anyway?
Is it safe to listen to these messages?

Also, I had a computer without a firewall hooked up to my internet
service, and then I replaced it with another computer that had a
firewall.  Since the old computer had ports that could be found on the
internet, does that mean that the new replacement computer can be found
by the hackers?
Thanks,
Security Newbie

Replies