Question for all the Linux gurus - i have an old laptop running i think Windows xp - started having problems and no horsepower to upgrade OS. Do I need to make an image of the disc before trying to install Linux on it? Do I need to make it dual bootable or what - I dont want to lose any files I may still have on that laptop. I have not played with OS on puters in probably 15 years so I dont want to make that computer completely unusable due to having just enough knowledge now to be extremely dangerous.