Windows 7Microsoft has officially announced Windows 7 build 7600.16385 as RTM, but due to the fact that no original untouched and unmodified official DVD ISO images from Microsoft are been leaked to Internet yet, making the genuineness and legitimate of the many home-made or self-made Windows 7 RTM often questioned and clean of malware status in doubt.

Update: Original Windows 7 RTM ISO has leaked.

Microsoft delivers Windows 7 RTM in DVD ISO images format to its various partners including OEMs (original equipment and PC manufacturers), system partners and MSDN or TechNet subscribers, way ahead of official Windows 7 general availability (GA) to general public on October 22, 2009. Thus, many people may already have access to Windows 7 RTM original official DVD ISOs, and inevitably some ISO images may leak to Internet for eager Windows 7 enthusiasts.

If you have downloaded any version of so called Windows 7 RTM DVD ISO, such as home-baked user-made Windows 7 DVD ISO which based on extracted original files, it’s wise to compare the MD5 or SHA-1 hash checksum value of the downloaded ISO against the official SHA1, MD5 and/or CRC hash check sum of official DVD ISO from Microsoft which is untouched, unchanged, and unmodified by anyone.

Here’s the file characteristics and properties of both 32-bit and 64-bit Windows 7 RTM Build 6.1.7600.16385.090713-1255 DVD ISO from MSDN and TechNet channel. Some channel may distribute the ISO files in other name, but it doesn’t affect its checksum.

Windows 7 Ultimate Retail English (x86)

Name: 7600.16385.090713-1255_x86fre_client_en-us_Retail_Ultimate-GRMCULFRER_EN_DVD.iso
Size: 2501894144 bytes
Date Modified: Tuesday, July 14, 2009, 17:32:44 PM
CRC: C1C20F76
MD5: D0B8B407E8A3D4B75EE9C10147266B89
SHA-1: 5395DC4B38F7BDB1E005FF414DEEDFDB16DBF610

Windows 7 Ultimate Retail English (x64)

Name: 7600.16385.090713-1255_x64fre_client_en-us_Retail_Ultimate-GRMCULXFRER_EN_DVD.iso
Size: 3224686592 bytes
Date Modified: Tuesday, July 14, 2009, 17:40:25 PM
CRC: 1F1257CA
MD5: F43D22E4FB07BF617D573ACD8785C028
SHA-1: 326327CC2FF9F05379F5058C41BE6BC5E004BAA7

Windows 7 Ultimate E Retail English (x86)

Name: 7600.16385.090713-1255_x86fre_cliente_en-us_Retail_UltimateE-GRMCEULFRER_EN_DVD.iso

Windows 7 Ultimate E Retail English (x64)

Name: 7600.16385.090713-1255_x64fre_cliente_en-us_Retail_UltimateE-GRMCEULXFRER_EN_DVD.iso
CRC: 77BE890E
SHA-1: 029DCCEDD7691206010F84CE58343405A4DA92C9

Windows 7 Ultimate Retail Simplified Chinese (x86)

Name: 7600.16385.090713-1255_x86fre_client_zh-cn_Retail_Ultimate-GRMCULFRER_CN_DVD.iso
SHA1: B589336602E3B7E134E222ED47FC94938B04354F

Windows 7 Ultimate Retail Simplified Chinese (x64)

Name: 7600.16385.090713-1255_x64fre_client_zh-cn_Retail_Ultimate-GRMCULXFRER_CN_DVD.iso
SHA1: 4A98A2F1ED794425674D04A37B70B9763522B0D4

Windows 7 Ultimate Retail German (x86)

Name: 7600.16385.090713-1255_x86fre_client_de-de_Retail_Ultimate-GRMCULFRER_DE_DVD.iso
SHA1: 642b7e172a0e7971ff9c666aeb3eb3d0cc58444b

Windows 7 Ultimate E Retail German (x86)

Name: 7600.16385.090713-1255_x86fre_cliente_de-de_Retail_UltimateE-GRMCEULFRER_DE_DVD.iso
CRC: 5A01C2A7
SHA-1: 37ac253129804211bd5f66020699bccb8da4fc63

Also available is the SHA-1 checksum hash value for Windows Server 2008 R2, which also been already been RTMed. The checksum had already been published once RTM build 7600.18365 been signed off.

Windows Server 2008 R2 Volume License (VL) English

Name: 7600.16385.090713-1255_x64fre_server_en-us_VL-GRMSXVOL_EN_DVD.iso
Size: 2,996,799,488 bytes
SHA1: AD855EA913AAEC3F1D0E1833C1AEF7A0DE326B0A

For user who wants to verify the originality of install.wim, the main installation setup file that hold all Windows 7 system files to be installed, here’s the SHA-1 hash code for isntall.wim of Windows 7 RTM:

32-bit (x86): A057C030FCEC3CE8B13C15745CC3845EC671A4AB
64-bit (x64): 049539998E39E59800B6026094F9049C4CCA2375

Check out the full coverage of Windows 7 RTM.