Windows just crashed. The computer won't boot back up. Those "System Recovery Disks" that came with your computer will erase all of your data. In most cases, when Windows breaks and will not start up again, none of your data has been lost, you just don't
Knoppix is a great rescue disc too. You can repair Linux or that other OS, backup data, recover passwords, etc. The following solutions assume that you have booted Knoppix on the machine that needs to be repaired.