Windows 10 upgrade no internet?

Question

Hi

Windows 10 Enterprise upgrade from 1803 to 20H2. Standard build with no third party security software and not encrypted. Upgrade deployed over VPN using SCCM Task sequence.

Upgrade went through without any issues however it now shows no internet on both wireless and ethernet even though I am still able to browse the web and connect to VPN. This will cause an issue with Office 365 though as it uses this rather than actually checking for internet itself.

I have updated to the latest drivers and reset the network connections. There's a lot of talk on the web about changing an internet policies reg key but this already exists in the right state.

Answer 1

Hi ,

Please first make sure the registry value of EnableActiveProbing is 1. If yes, make sure you have patched with fully windows updates for your 20H2.

I noticed that you have connected to VPN, if you connect to VPN and then disconnect VPN, will it return to normal?

Here is a similar thread discussed before, please pay attention to what
LocQuan said, check if this way can help you:

https://learn.microsoft.com/en-us/answers/questions/124300/still-not-fix-no-internet-connection-bug-in-window.html

Note: The article contains information about how to modify the registry. Make sure that you back up the registry before you modify it.

In addition, did you configure proxy on your VPN adapter?

Best Regards,

Candy

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Answer 2

Hi

I did mention in my post (perhaps not clearly enough) that I have already looked at that registry key and it exists in the correct state.

VPN makes no difference to the state of the connection either whilst connected or disconnected.

Anyway, I have just gone to the machine for the first time this morning and booted it up only to find the problem seems to be resolved, no updates have been installed overnight so it was either something I did yesterday or it just resolved itself. I have no idea what fixed it but I spend several hours on this yesterday as we have over 300 machines to upgrade and cannot risk our users not being able to use Office. Typical. At no point yesterday did I see an 'active' internet connection although general browsing was working.

Answer 3

Hi ,

If the problem has been resolved, it is hard for us to analyze the cause. I would suggest you monitor for a while or upgrading another machine to 20H2 for testing purpose, then observe whether the issue still occurs.

If the issue reproduces again, please feel free to open a new thread and we will continue to assist you on the new thread.

Best Regards,

Candy

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Answer 4

Not really very helpful.

Can you please explain the process Windows uses to determine whether or not it has a valid internet connection as it is clearly flawed.

Answer 5

Your issue is that NCSI reports no internet. NCSI primarily gets it work done through the use of network probes - a simple network request to an endpoint followed by a response. There are many different types of probes including active, passive, corporate, proxy, default gateway, and others. In addition some probes are done via HTTP, DNS, or both.

If NCSI sends the probe and receives a valid response it considers the client machine internet-connected.

There are multiple reasons why the NCSI icon might report "no internet" on a Windows device. Like:

1. Active probing has been intentionally disabled by setting EnableActiveProbing (REG_DWORD) = 0. under hklm\system\ccs\services\nlasvc\parameters\internet or a policy based equivalent.
2. Applications like MSFTVPN and VPNs that establish PPP connections that lack a route to the internet and 'by design" report "No Internet"
3. The network didn't allow direct access to website because the Proxy was not configured correctly
4. DNS server was configured on the VPN interface which caused DNS failure.
5. The network environment doesn’t respond ARP request that also caused DNS failure.
6. And so on.

You can also check NCSI event logs to see if there are something related for us to troubleshooting. Path: Microsoft\Windows\NCSI\Operational

If general suggestions doesn't work, we need to trace and monitoring logs to analyze the cause when you reproduce the issue again. Tool such as Network Monitor can be considered .However, analysis of traffic is beyond our forum support level and due to forum security policy, we have no such channel to collect user log information. So if you want to know the root cause, we recommend you open a case with MS Professional tech support service, they will help you open a phone or email case to Microsoft, so that you would get a technical support on a one-to-one basis while ensuring private information.

Here is the link:

https://support.microsoft.com/en-us/gp/customer-service-phone-numbers

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