35337: Acronis Backup: Installation of Enhanced Write Filter (EWF) Manager Deletes fltsrv String from Upper Filters

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Last update: 30-04-2021

Enhanced Write Filter (EWF) Manager Installation deletes fltsrv string from Upper Filters registry key


You install Enhanced Write Filter (EWF) Manager on the system where Acronis Backup and Recovery Agent for Windows is installed;

After system reboot, fltsrv string is not present in the registry key HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class{71A27CDD-812A-11D0-BEC7-08002BE2092F}\UpperFilters value:


EWF Manager deletes the fltsrv string due to incorrect registry key modifications during its installation.


Manually add the fltsrv string to the registry key value: