AMFileSystemFilter Driver has a high number of instances

Version 1

    Symptoms

    When viewing filter drivers in Windows using "fltmc.exe" you may notice "AMFileSystemFilter" driver has several instances running as shown below.

     

    fltmc.JPG

    Cause

    To ensure Application Manager is able to operate across an environment, 1 Instance of "AMFileSystemFilter" driver is loaded for each attached volume on a machine, a volume can be made up of a Disk Drive or Media device such as a DVD-Rom Drive.

     

    To verify the correct number of "AMFileSystemFilter" drivers are running you can run the "diskpart" command followed by "list volume" from an elevated command prompt, this will show you the amount of volumes listed which will match the number of "AMFileSystemFilter" drivers.