Although Windows XP includes the ability to synchronise the computer's clock with an internet time server, previous versions did not. Thinking Man Software's Dimension 4 solves the problem by enabling this feature for users of any version of Windows.
The software includes a list of suitable time servers across the internet, so it's just a matter of picking one and following the instructions. For users of Windows XP, it has some advantages over the included time synchronisation features, in that it is easily customised and has several tweaks.
The software is free for private home use, educational use and charities.

