Internet Time with NTP protocol on windows XP

To be able to use NTP on windows few actions has to be made :
1 - open a command prompt and type :
regsvr32 w32time.dll

2 - activate the service :
windows time

3 - open the Adjust date and time properties and select the tab "Internet Time"
There, check the box "Automatically synchronize with an Internet time server"
In the server list you may use the Windows server :
time.windows.com

4 - press the "Update Now" button to check that the configuration is working.