AVG Rescue CD: Free toolset for repair of infected machines
"The AVG Rescue CD is essentially a portable version of AVG Anti-Virus supplied through Linux distribution. It can be used in the form of a bootable CD or bootable USB flash drive to recover your computer when the system cannot be loaded normally, such as after an extensive or deep-rooted virus infection.
...The AVG Rescue CD is a free-to-use product that anyone can download. This also covers any new program versions and virus database updates." AVG Antivirus and Security Software - AVG Rescue CD
One of those tools you hope to never use.