when my windows 7 Rc will expire will i be able to update to a full retail?

or i will have to download it from the torrent client and make clean install,i have heard that you won´t be able to upgrade,just to make clean installation

You need to fresh install the final version. And you need to get it someplace other than a “torrent client.”

Windows 7 RC “Longhorn” (By Uchiha)

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