HP MP6 Base Model manual Enhanced Write Filter status service

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The EWF is a powerful tool for any digital signage player environment by preventing unauthorized users from altering or damaging the image.

Enhanced Write Filter status service

This service creates an icon in the system tray that shows the status of EWF. The EWF Status icon will appear as a red 'lock' when disabled, a green 'lock' when enabled, and a yellow 'lock' when the state is set to change on the next boot.

Status

Description

Example

 

 

 

Red

Disabled

 

 

 

 

Green

Enabled

 

 

 

 

Yellow

Commit Mode

 

 

 

 

Yellow with Red 'X'

Write Filter Corrupted

 

 

 

 

NOTE: In the event of a corrupted EWF state, you may be able to correct this by issuing the

command 'rundll32 c:\windows\system32\ewfdll.dll,ConfigureEwf' from an

Administrator's command prompt (type the command exactly as shown without the quotes) and reboot. If this is unsuccessful, you will need to re-flash the digital signage player unit with the standard factory image provided on the web.

If you are logged-on as Administrator, you can change the status of EWF by right-clicking on the icon and selecting the desired EWF state.

NOTE: Since EWF Manager console utility (ewfmgr.exe) and the EWF status service execute separate code, any status changes by ewfmgr.exe will not be automatically reflected by the EWF status icon.

To refresh the status icon after modifying EWF through ewfmgr.exe, you must right-click on the icon (you can then click anywhere on the screen to close the context menu). However, any operations made through the EWF status icon menu will be visible through the EWF Manager console application. Status and changes to the Enhanced Write Filter will be synchronized between the EWF status icon and the EWF Manager control panel applet.

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Contents Quick Reference Guide Copyright 2013 Hewlett-Packard Development Company, L.P About this book Iv About this book Table of contents HP Digital Signage Player Imaging Tool HP updates For more information For more information and updatesUser desktop IntroductionDesktop Administrator desktop Press and click Start Shut Down Log Off ConfigurationLogging on Automatic logonManual logon Administrator logon accessClick Start Shut Down Write filtersSystem date and time Click Change Settings Creating a new user account Local drivesUser accounts Drive C and flashClick Control Panel User Accounts Manage Another Account User Accounts utilityUser profiles Select Create a New Account Regional and language optionsManually Create a Network or Create an AdHoc Network Administrative toolsWireless network configuration Click the Administrative Tools icon in the Control PanelSelect Control Panel Windows Firewall ApplicationsWindows Firewall Remote Desktop Connection RDCMicrosoft Internet Explorer Open Control Panel Programs and FeaturesRight-clickWindows Internet Explorer 9, and click Uninstall Page Control panel extended selections Enhanced Write Filter Manager Select Start Control Panel HP Write Filter ConfigurationWrite filters Choosing the write filterEnhanced Write Filter status service EWF GUI Buttons Enhanced Write Filter GUIBenefits of the File-Based Write Filter DOS command-line tool boot commandsFile-Based Write Filter Manager File-Based Write Filter Status Service File-Based Write Filter GUI Control panel extended selections HP Digital Signage Player Imaging Tool Administration and image upgradesAccounts Index
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