Linux Live CDs are kind of the swiss army knives of PC troubleshooting and repair. One of the most useful distributions is Knoppix STD which comes with a full accessory of applications to figure out what’s ailing your PC and to fix it some 90% of the time. If you’re Windows installation isn’t booting then using a Linux Live CD can give you access to your Windows file system and registry. This has happened to me in the past. I had a Windows Vista installation that blue screened, but thankfully Opensuse 10 allowed me to fix the registry problem, boot my Windows partition and find a permanent solution. If you’re Windows installation can’t be repaired or put into a bootable state, you can use a Linux Live CD to safely pull your data off your Windows partition. These are two of many problems that a Linux Live CD can resolve. Use Linux Live CDs to troubleshoot your PC.