32-bit Windows 7 RC Build 7100 is accompanied by the following information: MD5: 8867C13330F56A93944BCD46DCD73590 and SHA1: 7D1F486CA569EFFFFB719CFB48355BB7BF499712. At the same time, the 64-bit of the Release Candidate for Windows 7 comes with MD5: 98341AF35655137966E382C4FEAA282D and SHA1: FC867FE1AB2E0A9796F9E4D155B44EA6998F4874. Microsoft only allows Windows Vista copies to be upgraded to Windows 7 RC. Windows XP to Windows 7 Build 7100 transitions are blocked by design, and Windows 7 Beta or pre-RC Build upgrades to the Release Candidate milestone, although also blocked, can be circumvented.More at; http://news.softpedia.com/news/Windows-7-Build-7100-Release-Candidate-RC-First-Look-110137.shtml
