Kaspersky Anti-Virus (Russian: Антивирус Касперского; formerly known as AntiViral Toolkit Pro; often referred to as KAV) is an antivirus program developed by Kaspersky Lab. It is designed to protect users from malware and is primarily designed for computers running Microsoft Windows, though a version for Linux is available for business consumers.

Kaspersky Anti-Virus features include real-time protection, detection and removal of viruses, trojans, worms, spyware, adware and keyloggers, as well as detection and removal of rootkits. It also includes automatic updates and a tool for creating rescue disks. In addition, KAV prevents itself from being disabled without user permission.

According to AV-Comparatives, Kaspersky Anti-Virus rates highly amongst virus scanners in terms of detection rates, even despite the fact that the program has failed two Virus Bulletin tests in 2007. In addition, PC World awarded Kaspersky Anti-Virus 6 the Editor's Choice in its 2007 anti-virus comparative.

Kaspersky Anti Virus 7.0 was "A-listed" by the prestigious UK PC journal PC Pro in late 2007, where it scored very highly for detection and removal of malware. PC Pro attribute this to “a combination of the software’s heuristic scanning and uncompromising approach to database updates. While many packages check for new virus signatures on a daily basis, Kaspersky runs to an hourly schedule, improving your PC’s chances of being immunized before an infection reaches it.”

Kaspersky Anti-Virus lacks certain features found in Kaspersky Internet Security. These missing features include a personal firewall, HIPS, a parental control tool, and an anti-spam application. It also lacks the Virtual Keyboard, a feature used to prevent keystroke logging.

In addition, Kaspersky Anti-Virus, like the majority of its competitors, is incompatible with numerous other antivirus and antispyware software.. This limitation is severe on operating systems without built in firewalls such as Windows 2000 since the Kaspersky installation routine can automatically uninstall incompatible applications, leaving the system exposed.

An edition of Kaspersky's anti-virus solution for Linux workstations is available to business consumers. It offers many of the features included in the mainstream version for Windows, including on-access and on-demand scanners.

Specialized editions of Kaspersky Anti-Virus are also available for a variety of Linux servers and offer protection from most forms of malware.

* In 2005, a critical flaw was discovered that could let an attacker commandeer systems that use Kaspersky Anti-Virus.
* In 2005, it was discovered that Kaspersky Anti-Virus had a "critical flaw" that allowed CHM files to insert malicious code.
* In 2009, Kaspersky's critical databases were exposed for days by hackers. It was reported "this type of critical flaw can probably be used to usurp legitimate purchases and renewals of their products - which could include the linking to malicious and backdoored versions of their software - thereby infecting those very same customers that were seeking protection from malware in the first place".