I am trying to install Ubuntu alongside Windows. I downloaded the Ubuntu 12.04 LTS desktop installer, extracted it and ran the wubi.exe as an administrator. An error window opened, saying: "The version of this file is not compatible with your Windows version."
The same error occurs when running directly from the ISO file.
I have Windows 7, 64 bit, with 8gb ram and I tried both the 32- and 64bit versions of Ubuntu. When I installed Ubuntu from the same files on my Windows XP PC, everything worked perfectly.