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How to troubleshoot slow Wi-Fi on Windows 11

By Iikka Isosaari · Windows 11 · Updated September 26, 2026

First find out what is slow: one app, one PC, the Wi-Fi link, or the whole internet connection. A speed-test result by itself cannot distinguish all four.

Narrow the problem with simple comparisons

1. Try a second website or app. One failing service may be a service-specific problem.
2. Compare another device on the same Wi-Fi, at roughly the same time and place.
3. Move the PC closer to the router where practical and repeat the same task.
4. If Ethernet is available, compare a wired connection. Keep the same download or test destination so you change fewer variables.

Check that Wi-Fi is connected to the intended network. Windows’ network troubleshooter can help with connection failures. Microsoft’s Wi-Fi troubleshooting guide provides steps for connection and adapter problems. Save network reset for a reasoned later step because it changes configuration.

Keep the measurements separate

Note the time, location, network, active VPN and background downloads. Repeat a measurement under comparable conditions. A single higher result is not enough to credit a setting change.

Gather evidence with Hanki Connect

Start with Connect → Basic checks. It tests your adapter, router, name lookups (DNS) and internet access in order, then gives one plain-language verdict that names the first step that fails. Name lookups are tested against several well-known sites, so one filtered name does not look like a DNS outage.

Then use Wi-Fi / latency to compare response times from your router with those from the internet, which shows whether trouble starts at home or further out. Advanced / DNS repair compares DNS servers, traces a route and runs a bounded transfer test. Check the displayed targets before starting: network tests contact external systems.

Ping or traceroute timeouts do not alone prove an outage. A destination or intermediate hop may limit diagnostic replies while still forwarding other traffic. Compare that evidence with whether the actual application works.

Hanki supports reviewed IPv4 DNS changes with undo. Record the starting configuration, change one thing and verify the result. Do not expect DNS changes to fix a weak radio signal, a saturated internet connection or every VPN issue.

Prepare a useful support request

Report whether other devices are affected, whether Ethernet differs, and which checks reproduce the problem. Include results from the same test conditions rather than an isolated “slow” screenshot.

Redact network names, addresses and other private details before posting a report to the Hanki Discord. If the PC itself freezes or restarts during the test, continue with the restart investigation guide.