Many antivirus companies are offering free rescue disks to provide their customers with an option to disinfect a system from the "outside". That's especially helpful in scenarios where a virus has damaged the operating system critically, so that it won't boot anymore on its own.
Most antivirus rescue disks are supplied in the disk ISO format and need to be burned to CD or DVD. Kaspersky recently started to offer the Kaspersky USB Rescue Disk Maker which, as the name suggests, can create a bootable rescue disk on an USB flash drive.
Kaspersky Rescue Disk 10 is designed to scan and disinfect x86 and x64-compatible computers that have been infected. The application should be used when the infection is so severe that it is impossible to disinfect the computer using anti-virus applications or malware removal utilities (such as Kaspersky Virus Removal Tool) running under the operating system.
Two downloads are necessary to create the bootable Kaspersky USB Rescue Disk:
The USB device needs to use the FAT16 or FAT32 file system, and not NTFS.
To create the bootable USB rescue disk do the following:
A click on Start copies the relevant files from the ISO image to the USB drive.
It is important to test the USB rescue device at least once, to make sure that it will work in emergencies. It is usually necessary to enable booting from removable devices in the BIOS, so that the boot process picks up the USB rescue disk before the actual operating system(s) on the hard drive.
Kaspersky's Rescue Disk can be used to disinfect systems that have been rendered unbootable by a virus and in scenarios where it is not possible to disinfect the virus while the operating system is running.
It is naturally also possible to burn the ISO image to CD or DVD, if that is preferred.
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Ghacks is a technology news blog that was founded in 2005 by Martin Brinkmann. It has since then become one of the most popular tech news sites on the Internet with five authors and regular contributions from freelance writers.