Always On Time
by PC Shareware, Inc.

  Always On Time is a Windows Internet utility that will connect to one of a dozen public atomic time servers and fetch the current atomic clock time value. If a difference in time is discovered between the atomic time server and your PC's clock, you then are able to update and synchronize your PC's clock with the current atomic clock time. Automatically synchronizes your PC each time Windows boots up.

Related software:
date, time, atomic, clock, precision, synchronize, atomic clock, ...