Problem description
While backing up virtual machines from VMware ESXi 4.x and 5.x, the following NTFS warnings are seen in Windows Event Viewer:
Event ID 50
Event ID 57
Event ID 137
Event ID 140
Event ID 157
Cause
VMware creates temporary duplicate disks while creating a quiesced snapshot. When the duplicate disk is removed, it will show up in the system event logs as errors.
For more information, refer to the VMware article.
Resolution
Refer to the VMware article. Contact VMware and Microsoft Support for more information.