Keep Your Firewall Active

You get a free firewall when you install Windows OS. By default, the Windows firewall is active and protecting your data. If you are using Windows Vista or Windows 7, this firewall should be sufficient to create a layer of protection for your data. If you are using any other operating system or a Windows version prior to Vista, you can download and install either ZoneAlarm or Comodo firewalls. Both are good and free to use. I recommend ZoneAlarm if you are not much into computer terminology and if you are confident of knowing what different alerts would mean, you can go for the Comodo firewall.