Where to find and change the update frequency of windows time synchronisation ?

This is under Vista

 

This article was written for Vista.
http://www.windowsreference.com/windows-vista/how-to-sync-vista-pc-with-an-internet-clock/

This article was written for 7, but would appear to work on Vista as well. It's a little easier to follow.
http://blog.basteagow.com/2009/10/30/windows-7-internet-time-synchronization-interval/

While written for XP, this KB article has a wealth of information.
http://support.microsoft.com/kb/314054

--L.

 

I did change the seconds between the brackets to 5 BUT the rest of the data of the "SpecialPollInterval" also changed and I don't know what those values were ...

 

5 is way too short: that's a 5 second interval! The shortest interval you should need is 86,400 (1 day) or 172,800 (2 days). The default is 604,800 (7 days/1 week).

I'm not sure what you mean by "the rest of the data ... also changed". Were you changing the correct subkey: SpecialPoll Interval and not SpecialPoll TimeRemaing? Be sure to make a backup of the registry before applying any changes.

Step 1:


Step 2:


--L.