Whenever I have computer problems, I'll often need SystemRescueCD to help me fix it. 

SystemRescueCd is a Linux system on a bootable CD-ROM for repairing your system and recovering your data after a crash. It aims to provide an easy way to carry out admin tasks on your computer, such as creating and editing the partitions of the hard disk. It contains a lot of system tools (parted, partimage, fstools, ...) and basic tools (editors, midnight commander, network tools).

To use SystemRescueCD, boot from the disc and at the prompt type

startx

and hit enter.  Then right click to get the menu to the tools.