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Creating, Importing, and Deleting Workspace Virtualization Layers Fails With Error 1089


Article ID: 163161


Updated On:


Workspace Virtualization (formerly SVS)


When trying to create, import, or delete layers using SWV Admin tool or Virtual composer an error message pops up:

An unexpected error has occurred. Error code 1089


The Windows Events show messages related to the fslx driver:

Code integrity determined that the image hash of a file is not valid.  The file could be corrupt due to unauthorized modification or the invalid hash could indicate a potential disk device error.

File Name:     \Device\HarddiskVolume2\Windows\System32\drivers\fslx.sys


The fslx.sys driver cannot start. To confirm that fslx.sys is not started open a command prompt as administrator and run:

sc query fslx


The following command normally starts fslx.sys:

sc start fslx


However if the system is missing a specific patch (KB3033929) this message will appear:

[SC] StartService FAILED 577:
Windows cannot verify the digital signature for this file. A recent hardware or software change might have installed a file that is signed incorrectly or damaged, or that might be malicious software from an unknown source.


Install KB3033929 and reboot the computer.