Open command prompt – Run as Administrator and run the following commands,

net stop w32time
w32tm /config /syncfromflags:manual /manualpeerlist:”0.au.pool.ntp.org 1.au.pool.ntp.org 2.au.pool.ntp.org 3.au.pool.ntp.org”
net start w32time
w32tm /config /update
w32tm /resync /rediscover