@mrplt
Why "too"? But it's true, mine ends with the "3V66T" as well. How did you know? If I click the "Error details" link I only get an empty box with an empty input box, looks like a bug to me.

I have the same issue. Upgraded from a fulyl legal and activated Windows 8.1, but Windows 10 tells me, that it can not be activated and I should try again later. What exactly is wrong here?

I wiped it in Windows 10 (full uninstall, followed by CCleaner, reinstallation of the network adapter, running "sfc /scannow", reentering all settings).

But I have it working now: I simply...

whoops double post, sorry, see blow

I had another VPN client installed, but already wiped it completly from disk, run CCleaner, did stuff like "netsh winsock reset" and "netsh int ip reset", fully purged the adapter from the system,...

I have the exact same problem. Updated from a fully working 8.1 on a desktop computer with an Intel I217-V onboard LAN controller and also tried two different USB WLAN dongles. All adapters have...