Most security companies offer a rescue disc along with their antivirus or other security products. This is because if a system is already infected with a malware which is not letting the antivirus installation to continue, then the user will have to use the rescue disc to scan and remove the viruses. The antivirus or security suite can be installed after cleaning the virus.
Here you will find the list of Rescue Discs provided by major security software vendors.
AVG Rescue CD is a portable version of AVG Antivirus Free. The bootable CD is a Linux distribution which contains the antivirus. The antivirus can be run once the user boots through AVG Rescue CD. It can remove infections, repair files and recover the system.
Avira AntiVir Rescue System comes in two forms, an ISO image and an executable. The ISO image is a bootable form of Avira AntiVir antivirus plus other addons which help you backup your data in an emergency.
This bootable rescue disc comes with the latest BitDefender antivirus and includes troubleshooting and management utilities like GParted, TestDisk and other utilities for browsing the Internet and opening documents.
F-Secure Rescue CD automatically scans the target system for viruses and malware. It will automatically try to disinfect the infected file and delete it if cleaning is not possible. The catch here is that if a Windows system file is deleted, the system will get corrupt and may not boot again.
Kaspersky Rescue Disk allows you to boot into the system using a graphic mode and will let you do the virus scanning and other recovery tasks. You can install it into the USB Flash drive using their own Rescue2USB tool. Otherwise, you can burn it on a CD or DVD and boot the computer.
Norton Bootable Recovery Tool is not free. It can be used by the people who have already bought a Norton product. Norton Bootable Recovery Tool will scan the system and will get the problem resolved fast.