I have tried to make a clean Ubuntu 12.04 installation on an Acer 4530 currently running Win Vista. It appears that even though I am able to switch booting sources through the BIOS, these other sources, USB ports and DVD drive are not active and they can not be activated through the BIOS. I really would love to format and have a clean installation of Ubuntu 12.04 but nothing works. WUBI does not work since it requires reboot through USB port, DVD does not work with an error message saying no operating system found. Any assistance will be greatly appreciated. Thank you.
Wubi doesn't "require reboot through USB port". But why are you trying to use Wubi? If you want to format and do a clean install, Wubi is not the right method.
You're do best to figure out why you DVD won't boot? Have you tried it on another machine? It's probably just a bad burn. Make sure you verify the