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Microsoft Windows 10 IoT Enterprise for Dell Wyse Thin Clients Administrator’s Guide

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Running Unified Write Filter command–line options

There are several command lines you can use to control the Unified Write Filter. Command–line arguments cannot be combined.

Use the following guidelines for the command–line option for the Unified Write Filter. You can also use the commands if you open the command prompt window with elevated privilege by entering command in the Run box.

Table 1. Running Unified Write Filter command–line options. Running Unified Write Filter command–line options
Command-line options Description
uwfmgr This command-line tool configures and retrieves settings for Unified Write Filter (UWF). If there are no command-line options available, it displays the command help.
uwfmgr filter enable This command-line enables the Unified Write Filter after the next system restart. The Unified Write Filter status icon is green when the Unified Write Filter is enabled.
uwfmgr filter disable

This command-line option disables the Unified Write Filter after the next system restart. The Unified Write Filter status icon remains red while disabled.

uwfmgr file commit C: <file_path>

This command-line commits changes to a specified file to overlay for a Unified Write Filter-protected volume. Administrator-level permissions are required to use this command.

The <file> parameter must be fully qualified, including the volume and path. uwfmgr.exe uses the volume specified in the <file> parameter to determine which volume contains the file exclusion list for the file. There is a single space between volume name and file_path. For example, to commit a file C:\Program Files\temp.txt the command would be uwfmgr commit C: \Program Files\temp.txt.

uwfmgr file add-exclusion C: <file_or_dir_path>

This command-line adds the specified file to the file exclusion list of the volume protected by Unified Write Filter. Unified Write Filter starts excluding the file from filtering after the next system restart.

For example, to add a registry directory HKLM\SYSTEM\WPA, the command is UWFmgr.exe registry add-exclusion HKLM\SYSTEM\WPA.

uwfmgr file remove-exclusion C: <file_or_dir_path>

This command-line removes the specified file from the file exclusion list of the volume protected by Unified Write Filter. Unified Write Filter stops excluding the file from filtering after the next system restart.

uwfmgr overlay get-config

This command-line displays configuration settings for the Unified Write Filter overlay. Displays information for both the current and the next session.

uwfmgr registry /?

This command-line displays configuration settings for exclusions of registry keys.

  • NOTE: If you open a command prompt window and enter uwfmgr ? or uwfmgr help, all available commands are displayed. For information on a command, use uwfmgr help <command>. For example, for information on the command, volume, enter uwfmgr help volume.
  • CAUTION:

    • Administrators should use file security to prevent unwanted usage of these commands.

    • Do not attempt to flush the data to the disk while another flush operation is in progress.

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