Hi,

you can Windows tell to synchronise your PCs time time with an NTP time server of your choice.
For example the german “Physikalisch-Technische Bundesanstalt (PTB)”, which is the responsible authority of the DCF77 (Time) transmitter, operates three of them:

ptbtime1.ptb.de
ptbtime2.ptb.de
ptbtime3.ptb.de

To set these server as timesource use the following command with Administrator rights:

If the the W32time service does not exists, register them

w32tm /register

start the Time service

net start w32time

Set time source
C:\>w32tm /config /syncfromflags:manual /update /manualpeerlist:ptbtime1.ptb.de,ptbtime2.ptb.de

or, if you want that the Computer acts also as a NTP Server in your local network

C:\>w32tm /config /syncfromflags:manual /update /manualpeerlist:ptbtime1.ptb.de,ptbtime2.ptb.de /reliable:yes

By default the windows time service has the startup type manual. Command to start the w32time service at startup:
C:\>sc config W32Time start= auto
Note: sc.exe expects a space character after the equal sign! Otherwise a syntax error occurs.

Force the computer to update its time:

w32tm /resync

Michael