It is a must that you need a security suite for your Windows computer to protect from virus, worms, Trojans, etc. If you are looking for a free security suite, you can get a paid one for free just one more day.
Bitdefender Internet Security is one of the best internet security suite available now.
Antivirus and Antispyware
Extremely fast. Non-intrusive.
Online Privacy Protection
Secure Online Storage
So if you like to have a 6 months license, get it from this link.
Please make sure you use the key you received to activate the product with in 30 days.