Xp not updating clock
Feel free to play with it if you want but that's my verdict.
I set XP to the correct time zone (Central Time (-6 GMT)), and set "X" to London, England. This is much simpler than all these mods being discussed. Perhaps even more interesting is if I update the time, it still reverts after about an hour! Is it just included somewhere on the Boot Camp image?
The startup script is the same, upon booting the script will run but the time will very slowly lose sync.
This page explains how to make the Windows network time (NTP) client synchronize its time more often than the default once per week.
So why did my Windows XP computer loose five minute?
To check the time synchronization settings on Windows XP, I double-clicked on the clock in my system tray and selected the Internet Time tab on the Date and Time Properties window.