[other] Ubuntu gives me a BSOD-ish screen on demo?

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http://ubuntuforums.org – Hi, I would like to run Ubuntu just from the CD but that doesn't seem to work. I have a HP Computer with Windows 7 currently, I have downloaded and burned Ubuntu on a CD and rebooted. Startup loads the ubuntu GNU GRUB system, but it is different than what it was on my old computer. A black screen with a white HUD gets displayed (I remember it being purple background) and I have 3 options: Demo Ubuntu, Install Ubuntu, and Check the disc for errors. Whichever option I pick, I get a messed up screen; it has black strips on the top and bottom, the bottom strip has white lines in it, and the middle (Hardware)