They've launched the 1709 update, pushing it in steps. However, it's an unfinished product.
A customer just did the update and lost his Internet connection. Also, Office 2010 crashed every time. W10 Pro, upgraded from 8, used for CAD in a home office, mobile Internet via USB.
So I started by rolling back the update which took a few minutes. Back in 1703 everything worked just fine. Checked for updates, reinstalled the 1709 update. This time Office worked fine and after some fiddling the Internet icon in the Taskbar said there's Internet. However, nothing worked. Not only the browsers, also Windows' Update and Help gave connection related error messages. I did all my tricks, all in vain.
So I called Microsoft. The girl asked me to do the Command Line magic I had already done plus some more but to no avail. Finally after having consulted a higher techie a couple of times she said there's flaws in the update. So she advised me to roll back the update once again and set the connection as metered to prevent it from downloading again until they've fixed the issues.