What should you watch out for when using the Enhanced Write Filters (EWF) on SIMATIC IPCs with Windows XP Embedded Standard?
You wish to install software or update software in a system protected by EWF mode (Windows XP Embedded Standard). If you disable the EWF for drive C:\ using the command "ewfmgr c: -commitanddisable" without rebooting the system beforehand, in rare cases it might happen that the system no longer starts after rebooting. The following message is displayed:
"Windows could not start because the following file is missing or corrupt:
The Windows Embedded Standard 2009 Installation on SIMATIC IPCs used a customized Registry entry. This Registry entry leads to the behavior described.
Install the attached Registry patch in order to be able to change the Registry entry. Installing the "REGFILTER_Patch.reg" Registry patch changes the Windows Registry.
Proceed as follows to install in a system protected by EWF Mode.
|1||Reboot the system.|
|2||Open the Windows input prompt "Start > Run...", enter the command "cmd" and then <ENTER>.|
|3||Switch off the EWF by entering the command "ewfmgr c: -commitanddisable" and then <ENTER>.|
|4||Quit the input prompt by entering "exit" and then <ENTER>.|
|5||Reboot the system.|
|6||Copy the "REGFILTER.zip" file into a directory on your computer and unpack the file.|
|7||Double-click the "REGFILTER_Patch.reg" Registry patch to execute it.|
|8||Switch on the EWF again with the command "ewfmgr c: -enable".|
|9||Reboot the system.|
Below is the Registry patch for downloading.
Regfilter.zip ( 245 bytes )