refers to the RTM (Release to Manufacturing) version of Windows 7. The exact build number is usually 7600.16385.090713-1255 , which Microsoft signed off as the final RTM build. This build was later followed by Service Pack 1 (SP1), but many users still prefer the original RTM for compatibility or personal preference.
Build 7600 does not include the essential security definitions and framework updates bundled into Service Pack 1 (Build 7601). It is highly recommended to manually download and install the standalone installer via a secure offline drive to patch critical vulnerabilities. Driver Installation product key windows 7 ultimate 64 bit build 7600 install
Plug your USB into the target computer and restart it. Press the appropriate Boot Menu Key for your motherboard (usually F12, F11, F8, or Esc) immediately as the computer turns on to select the USB drive. refers to the RTM (Release to Manufacturing) version