I just got a Macbook and whenever I'm saving files or moving files it either asks me for my password or says I don't have permission. I just used a picture editing application to make a blue square to set as my desktop and it said I didn't have permission to save it. I only have one account on this computer so I don't know what the problem is. Can someone help me out? EDIT: Thank you for trying to help, guys. It appears the OS just doesn't want to let me do what I want to do. I have a couple of other problems that you might be able to solve. 1. When I'm in full screen, I am not able to minimize a window, and the bar at the top disappears. 2. When I'm not in full screen, I can't adjust the window size. 3. When I change file extensions, the files become completely unusable. (I changed a .paint to a .png and it wouldn't let me use it. I had to change it back to .paint, open .paint and resave the file as a .png. Huge pain.) Any help is appreciated.