Re: 12.04 and 12.04.1 won't install
Did you try workarounds for video issues, especially if you have nvidia?
Most often you need to use nomodeset by pressing Esc as soon as you see the first purple screen, that will open the old style Main Menu.
Hit F6 for advanced options, select nomodeset, then Try ubuntu from the main menu.
If that loads the live desktop, you can install but you need nomodeset again on first boot until it boots once and let you activate the video driver.
Darko.
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Ubuntu 18.04 LTS 64bit
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