, is available as a free download directly from NIST. This utility allows Windows users to synchronize their computer clocks with the official U.S. atomic clock via the Internet. Download Links
NetTime is another open-source, GPL-licensed time sync client that runs as a system tray tool. It is lightweight, has no spyware, and is fully compatible with 32-bit Windows. nistime32bitexe free
nistime-32bit.exe , official utility provided by the National Institute of Standards and Technology ( , is available as a free download directly from NIST