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I have a problem in installing the Ubuntu on my machine that runs Windows 8. I downloaded this file (ubuntu-14.04.1-desktop-amd64) and when I started installing it I got two choices.

I selected the last one which is the (cd boot helper). It worked so good until I got this error. The error tells

could not retrieve the required installation files 
for more information, pleas see the log file: c;\users\sabahk~1\appdata\temp\wubi-14.04-rev286.log 
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marked as duplicate by Eliah Kagan, Rinzwind, Eric Carvalho, Tim, Seth Aug 22 '14 at 0:15

This question was marked as an exact duplicate of an existing question.

Install it without wubi? – LittleByBlue Aug 15 '14 at 12:41
Mohammad AL-Hamad: Did your computer come with Windows 8? If so, @Rinzwind is correct and you should see Windows installer for Ubuntu 14.04 LTS onwards (and Installing Ubuntu on a Pre-Installed Windows 8 (64-bit) System (UEFI Supported) for information on how you should install). While I don't think "could not retrieve the required installation files" is caused by UEFI/GPT, on such a system Wubi still won't work even if you do get it installed. – Eliah Kagan Aug 20 '14 at 14:13