When your computer starts behaving strangely or won't boot, a rescue disc is the ideal way to troubleshoot the issue and see if you can isolate the problem. There are plenty of great system rescue discs available if you need a tool to save your ailing system. This week we're looking at five of the best, nominated by our readers.

Linux fans, do you burn CDs for multiple distros and have to update those CDs when a new version comes out? As long as you have access to a wired internet connection, with NetbootCD you can download the latest versions of 7 distros directly from the disc.

Live CDs (and DVDs) are versatile tools, allowing you to boot into an operating system without installing anything to your hard drives. Let's take a closer look at the five most popular live CDs. Photo by bulinna.