I just installed Parallels, ejected that disc, and want to now install Windows, but I can only get the CD in about halfway. It feels blocked and I don't want to break the CD or the drive by forcing it in. It really feels like I will break the disc before whatever is blocking it will give. I tried re-starting but it's still doing it. What can I do? My husband is the computer person in our household but he's working a side job tonight, so if anyone is around and can help, that would be great!