[ubuntu] Problem with start install

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http://ubuntuforums.org – When i try and use virtual box. the installation work well. But when i insert the disk and boot the system its stuck always (no matter what option i choose) on black screen with blinking small line in the top left on the screen. Nothing happen. I have windows 7 run on my pc. so i even try the version from windows (wubi). Still nothing! can somebody help? (Hardware)