After upgrade to Windows 10 version 20H2 internet connection was gone and “Hello” function couldn’t turn on camera. Rolled back upgrades and everything worked fine again on previous OS release. 10 days later, I performed upgrade a second time with same result: No internet access.
After a few minutes, the laptop connects to Wi-Fi and I can connect and login to the router. I can successfully ping IP addresses (18.104.22.168 or 22.214.171.124 or 126.96.36.199). I cannot ping URLs and get no Outlook connection. All other devices on this router/ISP work fine. I tried it on two different router/ISP configurations. The problem is with the laptop configuration after the upgrade. The OS upgrade itself completed without any issues both times.
Perhaps the most telling observation is the result of the ipconfig /registerdns command: “Registration of DNS records failed: The configuration registry key is invalid.”
Laptop: HP Spectre X360 (core i7)
No idea how to fix this after all I tried (see below)! Your insights are much appreciated.
What I tried to fix connectivity issue
Running windows trouble shooter: “Your DNS server might be unavailable” (when I ran it at other times I got “Couldn't identify the problem”)
Rebooted router (despite the fact that all other devices on network are working as expected)
Checked HOSTS file: no entries
ipconfig /flushdns --> ok
Ipconfig/registerdns --> results in error message: “Registration of DNS records failed: The configuration registry key is invalid.”
ipconfig /release --> ok
ipconfig /renew --> ok
NETSH winsock reset catalog --> ok
NETSH int ipv4 reset reset.log --> ok
NETSH int ipv6 reset reset.log --> ok
1. sfc /scannow --> ok
2. DISM /Online /Cleanup-Image /RestoreHealth --> ok
3. [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\NlaSvc\Parameters\Internet] EnableActiveProbing set to 1 --> ok
4. [HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\NetworkConnectivityStatusIndicator] NoActiveProbe set to 0 --> ok
5. [HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\NetworkConnectivityStatusIndicator] DisablePassivePolling set to 1 --> registry entry not present
nslookup: doesn’t return any results (also no error message)