Windows Firewall, Windows Defender, and AVG Antivirus - simply serves the purpose

I have been using Windows Vista (Business Edition) for 6 month now. No choice, because I bought new notebook which comes with it. So far so good, I don't experience major problem with it, everything so far works smoothly. Only some minor problems which most of them related to software compatibility with Windows Vista.

Initially, I experienced a bit slowness in my notebook performance after using it for 2 months. I thought it because of so many additional softwares I installed into my notebook. Then I realized that preinstalled Norton Internet Security has major share in that slowness. So, even though it came free for one year license, I removed it and replaced it with AVG Antivirus (free for home/personal use, not free for commercial use). I've been using it for so many years already in my previous notebooks and never disappointed me. My notebook performance then getting better. So, this must be due to considered 'heavy' usage of memory/processor by Norton Internet Security's online scan.

Norton Internet Security comes with bundle of antivirus, antispyware, and firewall. Well, actually besides the antivirus, you don't need antispyware and firewall, because Windows (XP and above) provides free antispyware (Windows Defender) and built-in firewall. Since Microsoft has provided those two utilities for free and for sure it works seamlessly with Windows Operating System, I don't see a need to spend more money and our PC/notebook resources for same purpose.

For me, combination of Windows Firewall, Windows Defender, and AVG Antivirus is enough to secure my notebook from external threats. If your PC/notebook experiencing slowness, probably you can consider just using these three free utilities.