After performing the installation of SP1 beta, with my Windows 7 Installation Disc from within Windows to go for an "Upgrade" occurred a message stating that the version for the windows is already latest than the version I am going to install and that setup seems unable to be continue.
The only options are to perform a proper and fresh installation of Windows 7 (losing entire installed programs and user related configuration) or uninstallation of SP1 and then try again, which I performed and that moves feasible.
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