All you need:
2.A small change in the BIOS of your computer . Make the BIOS to boot from the cd than from the harddisk during startup .
Insert your linux mint bootable cd into the cd drive during the boot of the computer and boot from this cd and start linux mint.
Linux mint is an os similar to windows .After loading this os ,open the required drive . These files in your drive will be in a readonly mode in your harddisk and you can only copy the files not delete them .Just insert a pendrive and copy all your required files from your hardrdisk such as all your song collection etc.This OS also has a cd burning tool in it by default , so you can also write your files to a cd drive .