Gareth,
Try to set
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Parameters],
"time" registry string value to "NoSync" (by default it is set to "NTP").
You may change this value in TD for W32Time service related component (don't
remember which one but you may search for component that contains
w32time.dll).
KM,
BSquare Corp.
where is the setting to turn off the automatic updating of the system
time from the internet in TD?