1. Microsoft Security Essentials Free Antivirus –
This is one of the best antivirus introduced by Microsoft. It is free for life time if you have installed a genuine windows.
2. Symantec Norton Security Scan Free Antivirus –
Scanning viruses, malware, spyware, or other threats from your PC. Smooth and light in scanning.
3. Avast Free Antivirus –
It is also good and free antivirus, scans smoothly and it popular worldwide.
Download Link – https://www.avast.com/en-in/index
4. Avira Free Antivirus –
It ensures your computer virus free. It blocks all types of malware, including viruses, worms, Trojans.
Download Link – http://www.avira.com/en/avira-free-antivirus
5. AVG Free Antivirus –
This is also a good antivirus. You may download from below link.
Download Link – http://free.avg.com/in-en/homepage