As posted on Technet... File Name: en_windows_7_ultimate_rc_x64_dvd_347803.iso Date Posted (UTC): 4/30/2009 6:00:41 AM SHA1: FC867FE1AB2E0A9796F9E4D155B44EA6998F4874 ISO/CRC: 58FB2BE0 File Name: en_windows_7_ultimate_rc_x86_dvd_349010.iso Date Posted (UTC): 4/30/2009 6:00:41 AM SHA1: 7D1F486CA569EFFFFB719CFB48355BB7BF499712 ISO/CRC: E8A1C394