yep boba has it, its the boot order that is the problem most likely. It was set for the dvd to boot first. Reconnect the dvd drive start pc go into bios, lookup boot priority and switch 1st boot device to your hard drive. Exit and save your settings, and power down. You can safely remove the dvd again, and reboot. It should boot to windows or whatever OS your using. If it doesn not, then there are bigger issues at hand.