The system file <filename> was not restored to its original, valid version because the WFP restoration process was canceled by user interaction, user name is <user ID>.
As per Microsoft: "The Windows File Protection feature (WFP) logs an event if WFP is canceled while it is performing a scan of the system files or attempting to replace an individual file. Event ID 6406 indicates that a user canceled the replacement of a file that WFP targeted to be replaced and for which WFP prompted the user for the media source". See ME236801 for more details.
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