Microsoft Windows SDK for Windows 7 (SP1) and .NET Framework 4 (ISO)

The Windows SDK provides tools, compilers, headers, libraries, code samples, and a new help system that developers can use to create applications that run on Microsoft Windows 7 SP1.

Version:

7.1

File Names:

GRMSDK_EN_DVD.iso
GRMSDKIAI_EN_DVD.iso
GRMSDKX_EN_DVD.iso

Date Published:

5/19/2010

The Windows SDK is available as a DVD ISO image file so that you can burn your own DVD. If you do not need to burn a DVD the SDK is also available via a Web Setup that enables you to selectively download and install individual SDK components. To verify that you are downloading the correct ISO file, please refer to the table below to select the ISO file to download based upon your CPU architecture. Additionally, you can use the CRC and SHA1 to validate that the ISO file download was successful.

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x86 ISO File Name: GRMSDK_EN_DVD.iso

CRC#: 0xBD8F1237

SHA1: 0xCDE254E83677C34C8FD509D6B733C32002FE3572

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x64 ISO File Name: GRMSDKX_EN_DVD.iso

CRC#: 0x04F59E55

SHA1: 0x9203529F5F70D556A60C37F118A95214E6D10B5A

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Itanium ISO File Name: GRMSDKIAI_EN_DVD.iso

CRC#: 0x50EFE61D

SHA1: 0x2093EE439193EF79A1629FD9A826CE8D4DE9A93D

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It would also be worth downloading these two files

NDP452-KB2901907-x86-x64-AllOS-ENU.exe
  and
NDP462-KB3151800-x86-x64-AllOS-ENU.exe

Note that this IS the 7 SP1 version, the 7 SP 0 release came with .NET 3.5
also Note this is NOT the  OEM Preinstallation Kit also known as Windows OPK
 That must be downloaded from the OEM Centre.