Is slow internet your Wi-Fi or your provider?

A step-by-step way to tell whether slow internet comes from your Wi-Fi, your PC, your router or your internet provider.

Slow internet has several possible causes. The trick is to change one thing at a time and watch the result.

Step 1: check one device with a cable

Plug a PC into the router with an Ethernet cable and download a large file. Watch the speed on the taskbar. If it is fast, your provider is probably fine and the problem is wireless.

Step 2: compare Wi-Fi at different spots

Repeat the same download close to the router and then in the slow room. A big drop with distance points to signal strength or interference. Moving the router, switching to the 5 GHz band or adding a wired access point usually helps.

Step 3: look for competition

Open your live readout while nothing is supposedly running. If it shows steady traffic, something is using the connection. See what is using my internet.

Step 4: restart the chain

Restart the modem and router, then retest. This clears many temporary faults.

Step 5: test the provider side

With other devices idle and a cable connected, run a speed test. If the result is far below your plan, record the numbers and the time, and contact your provider.

Reading the pattern

A live traffic monitor will not tell you your maximum speed, but it shows whether data is moving and in which direction. Combine it with the slow internet checklist and how to check network speed on Windows.

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Published 2026-10-17