At the screen “Type your product key for activation,” enter your 25-character key exactly as written.
Note: You can skip this by clicking “Skip” or “Next” without a key, but then you must enter it within 30 days. For Build 7600, entering it during install is recommended to avoid activation hassles.

Here is the procedure for installing Windows 7 Ultimate 64-bit.

  • Optional: Service Pack 1 (SP1) – If your ISO is the original RTM (build 7600), you’ll want to install SP1 to bring the system up to build 7601. Download the Windows 7 SP1 package from Microsoft’s archive (requires a valid key to download). Run the installer and reboot.

    • Product Key Windows 7 Ultimate 64 Bit Build 7600 Install Access

    At the screen “Type your product key for activation,” enter your 25-character key exactly as written.
    Note: You can skip this by clicking “Skip” or “Next” without a key, but then you must enter it within 30 days. For Build 7600, entering it during install is recommended to avoid activation hassles.

    Here is the procedure for installing Windows 7 Ultimate 64-bit. product key windows 7 ultimate 64 bit build 7600 install

  • Optional: Service Pack 1 (SP1) – If your ISO is the original RTM (build 7600), you’ll want to install SP1 to bring the system up to build 7601. Download the Windows 7 SP1 package from Microsoft’s archive (requires a valid key to download). Run the installer and reboot.