I would suspect a firewall issue. "Disabling" a firewall doesn't always shut down all of the processes that run in the background, so it is better to configure it correctly for use in the network than to disable it.
Fujitsu Lifebook P727 laptop review
Best of the Grad Shows 2017: University of the West of England (UWE)
Best value Mac: Which is the best £1249 Mac to buy
Les meilleures GoPro 2017