Avira is the quick and easy way to protect you from online threats without too much hassle. You can get rid of trojans, malware, spies and identity theft and live the life you want with this antivirus. With just one product, many devices are protected. Improve your PC's performance with faster startup, fewer error messages, junk file removal, and more available memory. Avira has an estimated market share of 9.6% and over 100 million customers. This was considered the sixth largest antivirus vendor in 2012.AVASTAvast is an antivirus program available for Linux, Mac OS This has a user interface available in more than 40 languages. The name Avast stands for “Anti-Virus – Advanced Set”. AVAST Software as, formerly known as ALWIL Software as, is headquartered in Prague, Czech Republic and has offices in Redwood City, California; Linz, Austria and Friedrichshafen, Germany. Avast has received numerous awards from Virus Bulletin for 100% virus detection “in the wild” and also won the Secure Computing Readers' Trust Award. As of June 2012, Avast achieved 17.4% of the global vendor market share. AVGAnti-Virus Guard or AVG is a family of antivirus and Internet security software focused on protection, performance and privacy. Works on platforms and devices such as PC Mac, iOS, iPhone, Windows Phone and Android and developed by AVG technologies. AVG's headquarters is located in Amsterdam, the Netherlands and has 14 offices worldwide. As of December 31, 2013, AVG has more than 177 million active users. BullGuardBullGuard was launched in 2002 and is considered one of the fastest growing mobile and Internet security brands available on the market today. The product... in the center of the card... and is often referred to as KAV. This is an antivirus program developed by Kaspersky Lab and is designed to protect users from malware. This is designed primarily for computers running Mac OS Real-time protection, detection and removal of worms, viruses, Trojans, spyware, adware, malicious tools keyloggers and audio dialers, as well as rootkit detection and removal are some of the features of Kaspersky Anti-Virus. Instant automatic updates via “Kaspersky Security Network” services are also included. Its Security Network service helps users around the world make it easier to identify malware and reduce the time it takes to provide protection against new security risks targeting computers. Kaspersky Lab currently offers annual, two-year and three-year subscriptions.