Problem 1 When I try to delete partitions in disk utility it tells me that it cannot unmount them, the same thing happens when I try to erase my entire hard drive. I used to have rEFIt on my computer with Linux using the other 2 partitions. I have wiped every hard drive clean in my attempt to remove the partitions but have had no luck, this also caused my second problem. Problem 2 I have no operating system on my computer. I burned the dmg for lion onto a dvd but my mac doesn't want to boot off the dvd it only wants to run of "Restore HD" which redirects me to go buy lion, something I was trying to avoid doing. I burned the image onto the dvd, hoping that was the correct way to do it, maybe I'm wrong. I also burned a copy using disk utility, but neither copy works. Can someone please help me, I worked on this all yesterday and got nowhere, probably even when backwards. Thanks in advanced.