Unfortunately, this is a known issue with AppGuard (even mentioned in the release notes): Anomalies with non-English characters: 1. Folders and Files that contain non-English characters in their paths cannot be added to AppGuard policy. 2. AppGuard will not enforce User-space protection if the user’s logon name contains non-English characters. We are working on a fix. We do know that if you have a Program Files subdirectory with non-English characters in it, AppGuard will treat that folder as System Space and protect it. Currently, the only work-around is to user a user name with all English characters (sorry).