Configure Windows time with high (sub seconds) precision

Question

http://time.is/ is constantly reporting my system clock as several seconds off (usually ahead) even if I freshly force synchronization of windows clock with some of the inte

Answer 1

Standard Windows time service doesn't guarantee precision better than in order of seconds (see http://support.microsoft.com/kb/939322). So third party time synchronization service needs to be used for sub-second precision. List of available providers is maintained by NIST here: http://www.nist.gov/pml/div688/grp40/softwarelist.cfm.

I personally finally chose http://www.timesynctool.com/ (as it is free, reliable and mostly open source - so I can be sure what exactly it's doing)