BitDefender
BitDefender is an antivirus software suite developed by Romanian-based software company SOFTWIN. It was launched in November 2001, and is currently in its eleventh version. BitDefender replaced SOFTWIN's earlier AVX (AntiVirus eXpert) product range. The BitDefender group spun off from SOFTWIN in 2007. The BitDefender range includes antivirus products for home users, businesses, enterprise users and Internet service providers. Home editions support Microsoft Windows, Symbian OS, Windows Mobile and Mac OS X (Beta); business and enterprise editions support Microsoft Windows, Linux and FreeBSD. The current version of the Home/Home Office security suite includes antivirus, anti-spyware, firewall, e-mail spam filtering, backup, tune-up and parental control components. A free basic online scan is offered via the BitDefender website.

Reviews for BitDefender have been largely positive, and the home version of the suite was given the PC Answers editor's choice award in a comparative review in May 2007. As of June 2007, BitDefender has passed Virus Bulletin's VB100 independent tests 14 times out of 18 since first tested in 2002. It has also achieved an advanced certification from AV Comparatives for on-demand scanning, and standard level certification for catching unknown viruses, though was criticised for its slower scanning speed and higher instances of false positives. It is also the least expensive option from the top three antivirus solutions, as ranked by PC World.

Bitdefender protects from viruses, hackers, spyware and other e-junk. Older versions of BitDefender are made available for free download when newer versions are released. The first version which was made freely available was version 8. As of November 2007, version 10 of BitDefender is freely available for download. Unlike the commercial version, the free version only offers an on-demand virus scan, and doesn't provide real time scanning, and may therefore be less suitable for machines with a continuous connection to the internet.