Software is a service these days, so you're purchasing something to reassure you that your computer won't get virus/malware jacked. The licenses are usually good for 1-3 years of free definition updates. If you're comfortable paying for something, that's your prerogative, but there are many free alternatives out there.
- Avast
- AVG
- Avira
- Microsoft Security Essentials
- Panda Cloud
If you have Comcast, you can also get free Norton Security Suite co-branded as Constant Guard from Xfinity (yeah, what a lame name). It's available here:
http://xfinity.comcast.net/constantguard/Products/CGPS/norton/?cid=NET_33_641Otherwise, you can check with your internet service provider (ISP) to see if they offer a similar deal. It makes sense that ISPs should offer antivirus and internet security software, seeing as malware will utilize their network to attack other machines. Wasted bandwidth costs money and creates problems when other servers blacklist the ISP for the said virus attacks. I don't understand why more ISPs don't give this out free.