I am looking for the following.
Situation arises where a system may be infected by a virus, spyware, etc.
I want to be able to boot the system from CD (not USB). The CD will either have on it anti-infection software or will be able to access the Internet to download updates for the anit-infection software on it or be able to download freeware anti-infection solutions and their latest updates. Obviously the CD can not be written to so the updates will have to be put on a RAM disk it creates or some USB attached device that can store the latest updates for the purposes of the scan.