Will WUBI Installer work on Windows 8 that was upgraded from Windows 7?

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http://askubuntu.com – I upgraded my PC from Windows 7 to Windows 8, and wanted to reinstall Ubuntu onto the windows filesystem via wubi. However, I read in many places that Windows 8 causes many new problems with the installation through WUBI, and doesn't work on computers pre-installed with Windows 8 because of a problem in the BiOS or something of that sort. Does it work on computers that were upgraded to Windows 8? I'd like to get a confirmation before I go ahead and try to install it. Thanks! (HowTos)