Kaspersky Virus Removal Tool (KVRT) is a free antivirus tool from Kaspersky that used effectively for infected systems. This security software can be installed on a PC that already have an antivirus software or even installed from safe mode if the system had already infected by viruses and it doesn't allow users to install any security software.
Kaspersky Virus Removal Tool can be installed and run from safe mode to find and remove viruses, Trojans, rootkits, adware or spyware that cannot be removed in Windows normal mode. This tool is not suitable for a long run or daily use because it doesn't auto update the virus definitions, and users need to download the latest Kaspersky Virus Removal Tool to use the up to date virus definitions database.
Kaspersky Virus Removal Tool is only consider to use as complementary tool if your system already infected by viruses, Trojans, rootkits, adware or spyware and not to replace your antivirus software. It is just use for rescue to help your real antivirus software.