This article describes the procedure on how to fix the system "Freeze" when SynetoOS is taking an App Consistent snapshot. 


By default VMware tools has the VSS enabled in their installer and it requires a small "Freeze" or "Stun" to make a consistent snapshot.


The steps below allow you to disable VSS implemented in VMware and enable the VSS integrated in Windows which is not "Freezing" the system.



Step 1: Disable Snapshots

  • Temporary disable the snapshots of the VM from SynetoOS.


Step 2: Enable Windows VSS

  • Got to services.msc and find the Volume Shadow Copy. By default it is configured in Manual and it is not running.



  • Right click on it, go to Properties and select the Automatic option.




You can either start the service manually with right click and start, or you can wait for the reboot


Step 3: Disable VMware Tools VSS


WARNING: This requires a VM reboot


  • Go to installed programs in Windows and select the "Modify" option for VMware Tools.
  • In the installer select the "Modify" option and make sure the Volume Shadow Copy looks like in this screenshot.


Step 4: After reboot

  • After reboot you can doublecheck if the Volume Shadow Copy is running correctly.



  • You can start your snapshots schedules again from SynetoOS.

  • If states that VMware tools are not installed for App Consistent snapshots, use first the Crash Consistent and then the system will autodetect that VMware tools is installed allowing you to select again App Consistent.