I am selling my Mac Mini (with Microsoft Office already installed). What is the best way to clear the hard drive for a new user, BUT keep the installed software. I have lost the original Office disc, so I can't reinstall it after wiping the hard drive completely clean of everything. Basically, I want to get the Mac Mini cleaned-off and ready for the new owner, but really have no idea to do this. I am a novice. I'd appreciate any advice you have. Thank you!