Kaspersky Lab are behind some of the very best antivirus products on the market  providing complete protection against viruses and malware that threaten PCs All three of the Kaspersky Windows software – Kaspersky Internet Security  Kaspersky Total Security  and Kaspersky Anti-Virus – all have the same excellent malware-scanning capabilities  interactive and intuitive user-interface  and the same level of moderate impact on the performance of the protected computer