Unfortunately, I didn't think of backing up anything. The only thing I need to replace actually is my "system preferences" (The one that you can change your background and whatnot... I understand there are at least two system prefrences. This happened a few days ago, that I deleted off a "system preferences" icon because I had two for some reason. I am new to this aspect.... I am still learning the tricks... I would like to know what do I have to do to insure everything is going to be ok? The only things that I know are there that I want to save is my Itnes library. Unfortunately, I was niave in thinkng that removing one innocent looking icon on my doc wasn't going to be a problem. I'm going to reinstall sooner or later, I just want to know how I would go about backing up my Itunes? Would setting up a Time Machine disk now be beneficial without system prefrences. I do have a cousin(-in-law) who is like us. (MAC-"geek") and he has offered to help when I find the disk I need. I have learned my lesson. I should have just put the "added" system preferences in a folder I created to clean up my doc. Thank you in advance for any information you can give me so I can be a bit prepaired for what I have to do after I reinstall OSX.