yet you forget the biggest variable here, Avast. It auto updates, can impose new measures at any time!
try googling avast
eg. _https://www.google.com.au/search?client=opera&q=avast+socket+error+site:board.jdownloader.org&sourceid=opera&ie=utf-8&oe=utf-8&channel=suggest&gws_rd=ssl
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