If your computer is a member of a domain, your computer clock is probably
synchronized automatically by a network time server. If your computer is not
a member of a domain, you can synchronize your computer clock with an
Internet time server.
Ask your IT people.
See this for some commands for synchronizing the time on a member computer
in an Active Directory domain and How to synchronize an internal time server
with an external source..
How to synchronize the time with the Windows Time service in Windows XP
http://support.microsoft.com/kb/307897
Internet Time Feature Is Not Available When a Computer Is a Domain Member
http://support.microsoft.com/kb/289689
How to synchronize the time with the Windows Time service in Windows XP
http://support.microsoft.com/kb/307897
A client computer may not synchronize its time setting with the time setting
of the domain controller in Windows XP or in Windows Server 2003
http://support.microsoft.com/kb/842199
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Hope this helps. Let us know.
Wes
MS-MVP Windows Shell/User
In