The Do not allow compression on all NTFS volumes machine setting should be configured correctly. Compression can add to the processing overhead of filesystem operations. Enabling this setting will prevent access to and creation of compressed files. Fix: (1) GPO: Computer Configuration\Administrative Templates\System\Filesystem\NTFS\Do not allow compression on all NTFS volumes (2) KEY: HKLM\System\CurrentControlSet\Policies\NtfsDisableCompression