I tried installing Ubuntu 13.04 on my Windows 7 Home Premium Toshiba. First I downloaded it, then burned it on a virtual disc using magicdisc, afterwards tried installing. I had to use the cd help in booting since there was no disc in the drive. Upon rebooting it asks if I want to run Ubuntu or Windows. I click Ubuntu and a purple screen with the Ubuntu logo comes. Then the screen goes black and in white it says "completing installation" and below it it says "no medium was found for files"