When you buy an Internet Security suite, in addition to getting better protection, you usually get more features and services than you would with a free antivirus program. For example, most Internet Security suites include a firewall to help block intrusions and data theft (these firewalls tend to be better than the free firewall built into Windows), as well as a spam filter to help you control your junk email. Many security software vendors offer tech support for removing malware if you do become infected, and they may provide additional security features such as sandboxing, and even extras like online storage or PC tune-up utilities.
Choosing Your Antivirus for Windows 8
If your Windows 8 PC comes with a third-party antivirus preinstalled on it, you should first check the program's ranking; if it doesn't rank in the top four, consider opting out and using something else. As we've seen, the free antivirus built into Windows 8 should be easy to use and should provide excellent malware removal, but it will likely be relatively weak at detecting malware in the first place.
Though Windows Defender will still certainly protect you from most malware and may be suitable for some users, you may prefer to install on of the better-performing free antivirus programs offered by AVG, Avast, Panda, and Avira. Or for superior protection and more features, consider buying antivirus protection from one of the top vendors: G Data, Symantec (Norton), Bitdefender, or Kaspersky.