My Windows XP doesn't have the synchronization tab under Control Panel > Date and Time settings. I tried to change the related registry settings, and it worked ...
Setting Up the NTP Client XP and 2000. In Windows XP, time synchronization was set up using Control Panel > Date and Time. After clicking on the tab Internet ...
NTP for current Windows versions (Windows XP and later), with IPv6 support. The current stable NTP version can be used with current 32 and 64 bit Windows ... NTP Installer README · NTP Time Server Monitor · Network Time Protocol