Although the expected release date for Windows 7 RC1 is set to May 5 for public downloading, the wait seems to be over as Microsoft Windows 7 first Release Candidate having build tag 7100 got leaked from Microsoft partners which have already received the RC1 bits, the leaked DVD image file (.ISO) weighs 2.35 GB having build string 6.1.7100.0.winmain_win7rc .090421-1700.