I have so many error messages I don't even know where to begin. But, I am hoping that someone out there can help me fix my computer...I need it for school and don't have any money to have a professional look at it. First of all, slowly but surely many of my apps like Photobooth, TextEdit, Automator, Calculator, Font Book, ISync have disappeared. They all have an icon that has been whited out with a circle and a line thru. Most importantly Microsoft Word, Excel, and Powerpoint cannot be opened; I receive the following error message, "The application Microsoft Word quit unexpectedly." I also have been trying to download Office from the microsoft website, but cannot download either... The iMac is only 3 years old, I have the original disks, but they have been scratched and cannot be read...somebody please give me some ideas.