I have recently cleaned my harddrive on my first generation MacBook (with Lion), and it went very well, and afterwards, i shutted it down. When I turned it on, i couldnt go to...... okay, here I have a problem... Im from Denmark, and my MacBooks language is Danish too, so I dont know what its called. My guess is Systemsetup, but I dont know. It's where you change the computer, and make adjustments. Mission control is one of the things you can control. Hope you know what I mean. I cant find it, its not in the finder, or anywhere else. I dont need help to find it, because its simply not there, and my friends cant find it either. Is it possible that I have deleted it? I used an App to clean the harddrive. When I say clean, I dont mean completely delete everything, just delete the superfluos files and App's. Approximately 10-15 GB. I know that I can press the Apple in the top left corner, and find it there, but when i press it, it opens a kind of console. My conclusion is that I cant find it, so I have given up, and decided to format it. But I dont know how? I first tried to install Snow Leopard, but the CD is invalid. How do I format my MacBook?