Bitdefender free edition use the same scanning engines found in other BitDefender products, allowing you to enjoy basic virus protection for no cost at all. The software is very easy to use and provides Virus scanning and removal, Scheduled scanning, Immediate scanning your files and folders with just a right click, Skinable interface, Quarantine and Reports.
Advantages:
Blocks unknown viruses using advanced proactive detection techniques.
Detects and removes the newest breed of hidden threats known as rootkits.
The software is completely free.
Disadvantages:
This version is not for Windows Vista Operating Systems.