Automatically Synchronize Clock

Does anyone have any ideas how I can get the clock to automatically
synchronize with an Internet time server?

Here i can give Auto Clock..

1 - Go to start / run - type "cmd" and hit Enter ( this for XP )
For vista or Windows 7 you much go to start / All Programs / Accessories / Command Pormpt - Right-click and click Run as Administrator .

2 - On Command Prompt type this code step-by-step.

net stop W32Time

w32tm /unregister

w32tm /register

net start W32Time

3 - Now try synchronising again and see if anything's changed or Reboot.

Hope this helps, let us know how it goes