My roommate gave me her 2008 iMac because it wasn't working properly. Apple Store did diagnostics and said there were no hardware problems. I borrowed a friend's copy of Snow Leopard 10.6.3 and tried to restore the machine to factor settings. A prompt came up and said that the installation could not be completed and to contact my software provider. I tried to install again from the DVD and now I keep getting the same problem. After I choose the language and agree to the terms I should be able to choose the destination to start the install, but the field is empty. No disk. No nothing. Ideas? Hopefully I'm being clear. I've read a lot of these forum questions and realize how difficult for a non-computer guy to clearly articulate a problem.