Windows 10: Windows NCSI Showing as Offline, even though there is internet access.

Hi, Wondering if anyone else has seen this issue? The NCSI in Windows 10 is showing as offline even though there is an internet connection. This effects certain desktop apps from opening. Adobe, Outlook Desktop etc. This naturally is slowing down productivity for some of our clients that have this issue. I do believe this is only happening on HP Desktop PC's so far that's all I've seen with the Intel Network Adapter installed. I have actually managed to fix this by disabling the ipv4 checksum on the adapter by running this Powershell command: Disable-NetAdapterChecksumOffload -Name "*"&

:)

 

Network Connection Status Indicator (NCSI) Showing No Internet, but Browsing Works Fine.

I am using a Fortigate 100D UTM with 65 PCs connected. 22 of them have this issue. All the PCs are on the same Network / Domain so I find it hard to believe that there is a problem with the Router / UTM Firewall as all PCs would
be showing the same NCSI error.

As for your remaining suggestions; I've done all of these things, multiple times on several different PCs and all returned the same results - NCSI thinks there is No Internet but clicking on the icon resolves the issue, albeit
temporarily (several hours). Windows Troubleshooter does not find anything wrong with the Network Connection or Internet Connection.

If there were issues with the Firewall, NIC, or AV the "No Internet" issue would remain regardless. Clicking on the NCSI icon initiates a probe of the Internet via WinHTTP and the results of that probe satisfies NCSI requirements
and the status is changed.

Do you have any information or perhaps a script to test NCSI using WinHTTP?

 

NCSI Causes no internet issue

I am having a mostly intermittent issue on computers running Windows 10 Pro, Version 2004.

Sometimes the computer shows the globe in the bottom right of the task bar stating no internet connectivity, while there is actually internet connectivity. This is causing issues with certain applications such as communication between Outlook 365 and SharePoint.
I have tried all the following steps:

- uninstall network driver and let windows 10 reinstall

- EnableActiveProbing regedit fix

- Flush DNS

- Disconnect from network and reconnect

Sometimes these actions will fix the issue, however it always comes back. Is there a known permanent solution to NCSI?

 

Full Internet Internet Access works but NCSI / Network Icon say No Internet Access

Hi,

VPN on/off made no difference, i.e. I established the VPN, downloaded a file and exited the VPN, and the network connectivity icon remained ok.

About 12 hours later, the issue came back of its own accord. I still have internet access, but the icon says I do not.

There is nothing obvious in the Event Log, even under the NCSI section.

I thought I'd really force a reset of windows components/registry and so updated to Windows Insider Build .rs_prerelease.170624-1334.

The issue is still there. :-(

I assume now I will need to raise the issue under the Insider Preview forum.

Any ideas where to look? Is there a way to enable debug of NCSI?

Thanks

George