Windows time machanism

First we have the parameters items as seen below.

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Parameters

Version

This entry Indicates which peers to accept synchronization from:

• NoSync. The time service does not synchronize with other sources.
  
• NTP. The time service synchronizes from the servers specified in the NtpServer. registry entry.
  
• NT5DS. The time service synchronizes from the domain hierarchy.
  
• AllSync. The time service uses all the available synchronization mechanisms.
  

The default value on d