Download Windows 7 SP1 Build 7601.16556 - Beta 1 Escrow v.172

Another build of Windows 7 SP1 (Service Pack 1) has been leaked to the web. The new leaked build of Windows 7 and Windows Server 2008 R2 SP1 (both operating systems have the same code base and use the same service pack) is 7601.16556.100421-1510 v.172, reportedly of the beta 1 (b1) escrow milestone.
The SP1 is expected to be released in the last quarter of 2010, a year after Windows 7 RTM wass released.
The build 7601.16556 of Windows 7 SP1 was compiled on April 21st, 2010. Here’s the file characteristics of the leaked Windows 7 SP1 Beta 1 Escrow build 7601.16556.100421-1510, together with the torrent to download the SP1 through BitTorrent network.

File Name: 7601.16556.100421-1510_Update_Sp_Wave0-B1SP1.0_DVD.iso
Build: 7601.16556.100421-1510; Service Pack 1, v.172
Size: 1,306,019,840 Byte
CRC: 9EEC87D7
MD5: ADD8D6C1C17CAAF3C4C4B7A86BBE164A
SHA1: 0DE53C0F707FF9DD81457F7290B4A6E6E66EA089

Torrent (Magnet Link): MICROSOFT.WINDOWS.7.AND.SERVER.2008.R2.ESCROW .B1SP1UPD.WAVE0.DVD-MSFT

Inside the ISO image is the Windows 7 SP1 update package (KB976932):

File Name: windows6.1-KB976932-X64-INTL.exe
Platform: 64-bit
CRC32: E3B192AF
MD5: D68C18888D19C0FEC7FF73A33FBABF29
SHA-1: 1238102E8CB53BA8B02B33DF2E43B73D76B527BE

File Name: windows6.1-KB976932-x86-INTL.exe
Platform: 32-bit
CRC32: 3D9A2B0E
MD5: B6A846926031D6A07D14AB01B5018A97
SHA-1: CA489389C84DEA71B657292011E1489FB8854E2B

The service pack above works on for any version of Windows 7 or Server 2008 R2, including 32-bit (x86), 64-bit (x64) and ia64 platforms. It contains only wave 0 languages, which English, Spanish, Japanese, German, French. For system not running in the language above, install the English MUI language pack first. Note that after installing the SP1 Beta 1 Escrow above, the time bomb will be planted, with expiry date set to a day between April to July 2011.

Microsoft has mentioned that the SP1 only bring minor updates to Windows 7 and Windows Server 2008 R2, where new features will be limited to 2 new virtualization-related technologies: RemoteFX and Dynamic Memory, with an updated Remote Desktop client that takes advantage of RemoteFX introduced in the server-side. RemoteFX intends to make user experience across remote virtual desktops a better one with support for Windows Aero, full-motion video streaming, Silverlight animations, highly-synchronized audio, 3D graphics and applications. Dynamic Memory feature allows Hyper-V hypervisor to make use of physical memory not only efficiently but also dynamically while delivering as minimal an impact on performance as possible.

However, words is that Windows 7 SP1 will also bring significant performance boost for BitLocker Drive Encryption, and deliver fix for storage-related performance bugs. Main point is that, while most bug fixes have been delivered via Windows Update, some updates may only appear in SP1.

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