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active probing

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Active probing is a technique Windows uses to determine network connectivity status, most notably through the Network Connectivity Status Indicator (NCSI). When active probing fails or returns unexpected results, Windows may incorrectly report "No Internet access" even though web pages and apps load normally. This tag covers troubleshooting steps for such NCSI-related false negatives, including disabling IPv6, editing registry probe values, and running SFC/DISM to repair corrupted system files. Discussions focus on resolving the confusing UI mismatch between actual connectivity and the reported status, helping users identify whether the issue is a harmless probe failure or a genuine network problem.
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    Why Windows Shows No Internet While You Browse—and How to Fix NCSI

    Windows can report “No Internet access” while web pages and apps continue to load — a confusing UI mismatch that’s usually harmless but can mask real network problems and make troubleshooting harder. A recent Guiding Tech how‑to lays out the common quick fixes and three deeper repairs —...
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    • active probing captive portal dism dns monitoring firewall group policy internet access ipv4 ipv6 microsoft connect test ncsi network issues network reset no internet registry sfc vpn-proxy windows windows update winsock
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    • Forum: Windows News
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