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I've tried to install Ubuntu 12.04 on my PC with Wubi from Windows. After rebooting the system, and after selecting Ubuntu as OS, there's an error:

 Try (hd0,0): NTFS5: errors: "prefix" is not set.

I've read that it's normal after using wubi. Then i see a screen that say's :

installation will be complete in 5 seconds. press Esc for more options 

(sth like this!)

When it keeps on installing, in copying file step, my PC hanged up! I restarted the PC & those errors appeared again, so I pressed Esc.
Then one of the options was:

safe (none graphical)     (sth like this!)

I selected it and during installation i faced this error for to many times:

[drm:drm_crtc_helper_set_config] *ERROR* failed to set mode on [CRTC:6]

although the installation keeps on installing!!!

At last in the copying file step, after 65% done i saw some errors again that have loop(0) and more things like that!!!

share|improve this question
Try it with nomodeset - see Method 1 here: ubuntuforums.org/showpost.php?p=10089820&postcount=8 (after adding nomodeset in those instructions hit Ctrl+X to boot) –  bcbc Feb 9 '13 at 21:08

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