Time synchronization
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      How to set up a Windows PC as an NTP server

      Description of how to set up an independent local NTP server on a Windows PC

      Configuring an SNTP server in Windows 7

      It's possible to configure Windows 7 to act as an SNTP server.

      This guide should also work for Windows 10, the registry entries are identical.

      First, stop the “Windows Time” service in “Services” (START > Control Panel > System and Security > Administrative Tools > Services).

      Then open the registry editor (START > Run… > regedit), move to “HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\W32Time\TimeProviders\NtpServer” and set the “Enabled” value to 1.

      Afterward, go to “HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\W32Time\Config” and set the “AnnounceFlags” value to 5.

      Finally, start the “Windows Time” in “Services” and set the start type to “Automatic”.

      • If the firewall is enabled please add permission to Port 123 (UDP) or disable the firewall.
      • Be sure, that the service is started after the re-start of the PC.