The tools in this review are known as a “rescue CDs.” These are all free, Linux-based operating systems that one can download and burn to a CD-Rom. One of the more common questions I hear from readers with computer virus infections is, “How do I get rid of a virus if I can’t even boot up into Windows to run an anti-virus scan?” Fortunately, there are a number of free, relatively easy-to-use tools that can help on this front.