It's time to talk about how Windows time synchronization works. The service called W32Time is responsible for this on Microsoft operating systems.
In order to configure it, you must make the appropriate changes to the registry. The most commonly used parameters relate to the lists of sources for time, as well as the intervals of this synchronization, after which the source will be accessed.
Windows XP time synchronization occurs from only one source. Even if your list has a rich list, the system will use only one. Why indicate a large number of sources? Everything is very simple. This is done so that if the first is unavailable, the system will refer to the next in the list.
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Now you can be one hundred percent sure that the clock on your computer or laptop will display the correct time. I just want to warn you that working with the registry must be very careful and attentive. No errors are allowed. Otherwise, you risk reinstalling your operating system.