Apparently Microsoft pushed an update to Windows 10 that breaks the internet connection. Check that Windows update KB3206632 has been installed by running the Control Panel, then click “Programs”, then “View Installed Updates,” then plug KB3206632 into the Search text box at the upper right corner of the Installed Updates dialog window – you should see the update in the results. If it’s not there, and you’re having stress connecting to your network, you may need to download the update from here and take it to the computer on a thumbdrive.
See this article for more details.