Windows users have several options at hand when their system does not boot anymore. They can try to boot into Safe Mode, use System Restore to recovery the system to a previous state, or use repair options on the Windows CD to repair the issue. When Windows 8 gets released, options get even better with the included reset and refresh options.
Sometimes though you may need something more powerful, for instance if you need to correct partitioning errors or recover files from a failing hard drive.
System Rescue CD is a