We like UBCD for Windows. It is a free live CD that is using Windows operating systems. It is based on Bart's PE. It is useful for trouble shooting any problem that happen to our computer. Especially, whenever our computer crash or can't boot up, it is very handy. Since it is a live CD, the computer will boot up with this CD and load the Windows operating systems. It also able to see the hard disc, whether is NTFS or FAT. This cd also come with lots of useful tools for administrator works and trouble shooting the computer. I always keep it in my computer beg in case I need it. Beside this, there are lots more live CD in market. Any suggestions are welcome.