Windows – Completely disable Date and Time sync in a Hyper-V VM

clock-synchronizationhyper-vwindows

No matter what, a Hyper-V virtual machine keeps finding ways to sync time with the host.

I have:

  • Disabled the time synchronization service
  • Disabled Windows time
    synchronization on the guest machine
  • mapped time.windows.com to 127.0.0.1 on the hosts file on the guest machine
  • used the Security Policy console to remove all users from being able to set date and time

What's interesting here, is that somehow Windows resets the last point (security policy) and adds back LOCAL SERVICE to the list of users allowed to set date and time. This is a totally unexpected behavior to me.

Anything I am missing?

Best Answer

How about unchecking Time synchronization option in Integration Services under VM settings? enter image description here

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