Here's a rather old article about rescuring your data and computer using Knoppix – it uses Knoppix 3.7.
You may have seen it a while ago, but here it is.
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 have a way to get to it. These instructions are a way of getting to your data when Windows won't work. If these instructions fail to recover your data, don't panic; even in cases of physically damaged drives, reformatted drives, and accidentally deleted files, professional data recovery companies typically have a 95 to 98% success rate.