I bought my first mac (ibook) a couple of weeks ago and have loved it. One night last week I was just playing around with it when I came across a screen that had my computers name on it, where it could be edited. I wanted to change it from the name I put in the first time I turned it on. I changed the name and didn't think anymore about it. A couple of days later I turn my ibook on, load itunes and itunes comes on like it's the first time i've used it and there's no music in it! I ahve a bit of a panic and wonder what happened but i've got some software to take the music off my ipod and on to itunes so I reload all my music back on to itunes. Then I load iphoto and it's the same thing, it loads like it's the first time i've used it and none of my photos are there!! The screen I changed the computer name on was in System Prefrences/Sharing. When I click on the Hard Drive/Users there is now the house icon with my original computer name and a folder next to it with the new name. Inside that new folder is all my music, photos, documents, etc but in the house icon there is nothing (apart from all the music I re-installed from my ipod!!). In System Prefrences/Accounts there is only one account. Can anyone tell me what I've done and how I can reverse it.