Windows xp clock not updating
Note: The following process requires administrator (installation) rights on your computer.
The default time period is 7 days calculated in seconds.
After that the time service will not do anything -- or run at all -- until the Task Scheduler starts it again.
I suspect if you modify the Special Poll Interval value and change the Synchronize Time task frequency then it might work, but that is difficult to verify.
If you wanted to change this to update every day, you would use 86400, or 60 seconds * 60 minutes * 24 hours * 1 day.
I wouldn’t recommend setting this to anything less than 4 hours worth, or your computer might get banned by the time servers.
On the other hand, my method (below) is a similar amount of effort and is trivial to verify: You can mess up your system time and then manually run the task to verify that it gets corrected right away.
If you have never used the system registry before, ask someone who has.This page explains how to make the Windows network time (NTP) client synchronize its time more often than the default once per week.This was tested on Windows 7 but should work with Windows XP and above.Change Your Firewall Settings Third party firewalls will often block the time servers, causing the sync to not work properly.If you are using Mc Afee or another firewall, you’ll need to use the configuration utility to unlock NPT access on UDP port 123.
As far as I can tell, the registry value changes how often the time service wants to sync but only applies when time service is actually running.