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I downloaded ubuntu-12.04.2-desktop-amd64.iso and wubi.exe from I saved both the iso and wubi in the same folder. However, when I try to install Ubuntu wubi starts downloading Ubuntu again. But, if I place the 32 bit iso in the same folder with wubi, wubi detects it and starts installing the 32 bit version. But I want the 64 bit version because my computer has a 64 bit processor architecture (intel i5). Please help me, I tried searching online but have found nothing. Thank you very much.

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The only way to find out why it's rejecting the ISO is if you look in the log file in the %TEMP% directory. You can pastebin the contents and then edit your question with a link to the pastebin address. But Wubi should use the ISO unless there is something wrong with it. – bcbc Feb 17 '13 at 4:52
Which Windows are you using? – Jack Feb 17 '13 at 6:21

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