I downloaded ubuntu-12.04.2-desktop-amd64.iso and wubi.exe from http://releases.ubuntu.com/precise/. 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.