IpConfig/NTPUpdate Registry Key
JNIOR attempts to synchronize with a network time server every 4 hours (240
minutes) by default. The update period may be adjusted through this Registry
key. This defines the period in minutes and can be set for any amount of
time 5 minutes or longer. To disable NTP synchronization you can set this
key to 0. This configuration setting takes effect on boot.
HELP Topics: DATE