Always check the SHA-1 or MD5 hash of an ISO against official MSDN lists to ensure the file hasn't been tampered with or infected with malware.
: If you need a more stable legacy version, Service Pack 1 (Build 7601) is the final major update for Windows 7. windows 7 sp0 x64 build 617600 full version link
: Available in both 32-bit (x86) and 64-bit (x64). Compilation Date : July 13, 2009. The Ultimate Guide to Windows 7 SP0 x64
The identifier Windows 7 Build 617600 typically refers to the Official RTM (Release to Manufacturing) version of Windows 7, technically known as Build 7600.16385 Compilation Date : July 13, 2009
If you're looking for a legitimate way to get Windows 7, you might consider the following options: