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Do I need Norton on top of firewall, pop-up blocker, virus and spyware protection?

My repaired computer now has Windows XP Pro SP2. I recently got SBC-Yahoo DSL service along with a Linksys wireless broadband router. Do I also need to install my Norton SystemWorks suite? XP has a firewall and my DSL has anti-spyware, virus protection & pop-up blocker.
Yes, you should. The XP firewall is like many other features Microsoft provides -- it's enough to do the job -- barely. Look at WordPad vs. Microsoft Word for Windows. It's barely adequate, but will do the job. If you want something better, you'll have to go buy it. It's a common practice in security to take a layered approach. That is to say that you should never rely on any one mechanism to protect you. Please also see Desktop security tools.

This was first published in October 2005

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