RichardHowells posted on July 08, 2017 19:46
...at least I think it did. I opened my computer to find that it appeared to have just installed some windows updates.
After that I was unable to get my Wireless card to connect to the hotel WiFi. I got more suspicious when the WiFi didn't work at my client's either. I fiddled for ages finding and installing older/newer/different wireless card drivers. None of them made any difference.
Later I discovered that I could not get onto another client's VPN. I couldn't be sure it was caused by the same updates, but it seemed a big coincidence.
I found some advice to try Resetting networking. It's in recent (at the time of writing - July 2017) builds on Windows 10. Settings -> Network and Internet -> Status and at the bottom click Network Reset. It requires a reboot.
This helped significantly. Now at least the major functions of the WiFi worked. I could send email and browse web sites. The VPN was still broken.
I tried removing/replacing the VPN connection. Didn't help.
Eventually I found some evidence in the Event Viewer of a 720 error on trying to connect to the VPN. I then found some advice (here https://support.purevpn.com/error-code-720) I'm not using their specific product but I tried the advice to remove all the Wan Miniports. Find them in Device Manager. A scan for hardware changes reinstated them and that was the key. VPN working again.
Shout out to purevpn for putting useful support information online.