If you’re using a recent Windows version, you can also use the ntp client that is built into the system. Just execute:
net time /setsntp:pool.ntp.org
With some versions of Windows you can also specify more than one server
net time /setsntp:"0.pool.ntp.org 1.pool.ntp.org 2.pool.ntp.org"
DK
net time /setsntp:”0.dk.pool.ntp.org 1.dk.pool.ntp.org 2.dk.pool.ntp.org”
at the command prompt. This is known to work on Windows 2000/XP/2003. The same can be achieved by, as administrator, right-clicking the clock in the taskbar, selecting ‘Adjust Date/Time’ and entering the server name in the ‘Internet Time’ tab.