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Genuine Windows 7 SP1 ISO File And SHA1 Checksum Available On Official Site

Both Windows 7 SP1 and Windows Server 2008 R2 SP1 ISO image files are ready for download, if you’re MSDN and TechNet Subscriber or Volume License customer.

If you’re not one of these groups of customer but going to format and reinstall Windows 7, then you might have to slipstream SP1 to Windows 7 installer.
The service pack 1 will be made available to general public on 22nd of Feb 2011, via Windows Update and Microsoft Download Center.

Otherwise, get a genuine Windows 7 SP1 DVD or ISO image file from suppliers, Windows administrators in office, friends, or even download it from P2P networks (BitTorrent, eMule, etc).

Whichever sources you’ll get the ISO image file, you should check the ISO file checksum (SHA1) with the one published on official site.

The official Windows 7 SP1 ISO image file and SHA1 file checksum.
Obviously, file checksum verification is necessary to ensure file integrity, i.e. to confirm it is a genuine ISO file that has not been tampered by intention (if it is sourced from 3rd-party or P2P network) or the file download has completed successfully (not corrupted during download).

To verify SHA1 file checksum, you can use HashCheck Shell Extension or digestIT 2004, both are file verification freeware for Windows 7.

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  1. Savy 09-08-11@00:08

    There is a simple application “Checksums calculator” a GUI tool to calculate md5, sha1, sha256, sha384, sha512 witch can run under Linux, Windows and MacOS x operating systems on both 32 and 64bit architectures. For more info take a look here: http://www.sinf.gr/en/hashcalc.html

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