Since Microsoft Windows7 Beta has been released, quite a few fix releases of Windows7 came into market, every time before Microsoft officially announced these RC releases, they were leaked in the market through various resources, some of them also turnedout to be fake. Same happened with new upcoming Windows 7 RC (build 7100) it’s available on torrents websites before it is officially announced by Microsoft.
But this 7100.0.winmain_win7rc release in market seems to be legit; there are various resources for downloading its torrents like The Pirate Bay, Mininova etc. Just visit them and search for torrents of “7100.0.winmain_win7rc Release”, all available torrents would be listed. After downloading ISO, you can burn it on a CD and install it.
Microsoft is planning to release this new built officially on May 5th, 09; so it’s not very far away, you can download and test the new release through torrents, but it would be better if we wait for official release.