The current contents of the disk are written to a shadow copy buffer before the write takes place.

VSS is a copy-on-write driver that intercepts disk writes before they actually happen. Please note: VSS requires at least one NTFS volume to be present and online for it to operate (without one you will receive the error: E_PROVIDER_VETO ). Any failure is caused by other software or system configuration problems and will affect every program that uses VSS. Macrium Reflect cannot cause VSS to fail, it simply uses the service. VSS has been included with every version of Windows since Windows XP SP1. Please Note: Microsoft Volume Shadow copy Service is a standard Windows service and not installed by Macrium Reflect. In this tutorial I’ll take you through some troubleshooting steps to locate and fix VSS problems and enable your disk images and file backups to complete successfully. When VSS fails it can sometimes mean that you are unable to create a disk image or backup open files with Macrium Reflect. Macrium Reflect uses a Microsoft service called Volume Shadow copy Service to enable disk images to be created and files to be backed up when in use.

Fix macrium reflect error 9