Windows Time


Makes it possible to synchronize the computer clock with another system using the Network Time Protocol (NPT) on TCPIP port 123 (UDP).

Note in WinXP it will automatically try to synchronize with an Internet Time Server. To configure this synchronization double click the clock on the taskbar and select the Internet Time-tab.

net time /?

Note NET TIME uses the IPC$ to synchronize time, thus the remote machine need to have the Server service (File and Printer Sharing) activated.

To restore the Windows Time Service if it has been broken, run these commands:

net stop W32Time
w32tm /unregister
w32tm /register
net start W32Time

More Info MS KB120944
More Info MS KB216734
More Info MS KB223184
More Info MS KB224799
More Info MS KB232209
More Info MS KB258059
More Info MS KB307897

  • Automatic, if doing domain logon where the client-time must not be more than 5 mins off.
  • Disabled, if not needing to be that timely.
Default State:
  • WinNT4/2k: Manual.
  • WinXP/Win2k3/Vista: Automatic.
  • Win7: Manual.
Process Name:
  • None
  • None