Set your clock automatically

Like most clocks, the clock on your computer gradually becomes inaccurate as it loses a few seconds each year. However, if you have an Internet connection, Microsoft Windows XP can automatically synchronize your clock to keep it accurate.
To configure your clock to automatically synchronize with Internet time servers

1.	Right-click your clock, and then click Adjust Date/Time.
2.	Click the Internet Time tab. Click the Server down arrow, and then click time.nist.gov. Notice that Internet time synchronization is enabled by default.
3.	Click Update Now. Windows XP contacts the Internet time server and sets your clock.
4.	Click OK.

Now, your computer is connected to the Internet time server.