Enhanced Write Filter (or EWF) is a component of Windows XP Embedded and Windows Embedded Standard 7 which stores volume changes on another media instead of applying them to the original volume.
If the EWF component is enabled on the industrial PC, after the activation of the JMobile Runtime PC license, the license file will be available only until the PC power off, then all the changes will be discarded and will be necessary to activate the license again at next power up.
This FAQ explains how to successfully activate JMobile PC Runtime license if EWF is enabled.
Verify if the EWF is enabled on the industrial PC, if the filter is enabled follow the steps below. This procedure allows to permanently store the license file on disk keeping the EWF component running, protecting the system against unwanted disk writes.:
NOTE: For more info about the enable/disable EWF commands, please refer to this FAQ:
07/07/2014 - How to configure Enhanced Write Filter (EWF) under Windows OS
eTOP-eCC, eTOP-EPC, eTOP-IPC