Have you installed any 'ad-blocker' programs on the machine you are having problems, and also the other machines?.
Do you use Avast, and you do, did the recent Avast update advice that you download Abode Air, and you installed that?.
Hands-on: Acer Predator Triton 700 review
1995-2015: How technology has changed the world in 20 years
This poetic animation about monsters is illustrated in a Van Gogh painterly style
Apple predictions 2017
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.