im currently using a modified version of windows xp but i want to switch over to a linux operating system to do some things and start learning more about it. ive heard of this software knoppix that ive been interested in starting to use. the question i have is that i heard once you burn the software onto a cd its like its own operating system within the disc. is it true that you can use knoppix as a linux operating system and then take the disc out and still have my old windows operating system?