Windows 7 RTM is now officially signed off by Microsoft and quietly leaked on the Internet. If you are in the mood to download the RTM before the actual release date, then you must be assured of some signs.
Some of the leaked Windows 7 builds pretend to have malicious code integrated into them. That’s why you must check a build before installing to see if it’s free of any issues. The CRC code and SHA-1 checksums can help you ensure if a build is real or fake.
Windows 7 Original CRC & SHA-1 Checksums:
Windows 7 Retail Ultimate English (x86)
Name: 7600.16385.090713-1255_x86fre_client_en-us_Retail_Ultimate-GRMCULFRER_EN_DVD.iso
CRC: 0xC1C20F76
SHA-1: 0×5395DC4B38F7BDB1E005FF414DEEDFDB16DBF610
Windows 7 Retail Ultimate English (x64)
Name: 7600.16385.090713-1255_x64fre_client_en-us_Retail_Ultimate-GRMCULXFRER_EN_DVD.iso
CRC: 0×1F1257CA
SHA-1: 0×326327CC2FF9F05379F5058C41BE6BC5E004BAA7
Windows 7 Retail Ultimate E English (x86)
Name: 7600.16385.090713-1255_x86fre_cliente_en-us_Retail_UltimateE-GRMCEULFRER_EN_DVD.iso
CRC: 0×953EFBCC
SHA-1: 0xBC10F09B86DCBAF35B31B0E6FBA7D006ACAAD28D
Windows 7 Retail Ultimate E English (x64)
Name: 7600.16385.090713-1255_x64fre_cliente_en-us_Retail_UltimateE-GRMCEULXFRER_EN_DVD.iso
CRC: 0×77BE890E
SHA-1: 0×029DCCEDD7691206010F84CE58343405A4DA92C9
You need to compare and match these hashes exactly with your download Windows 7, to check/verify if you have a proper aka real build or not?
Use this post: HashOnClick – Calculate & Verify Hash values of a file
Update: You can also use Windows 7 ISO Verifier by Long Zheng, which is the easiest way to check and verify your Windows 7 builds.
Download Windows 7 ISO Verifier (EXE, 253KB)
