Laptop or Desktop Won't Connect to Wi-Fi

Steps to fix it

1. Check for a physical or function-key Wi-Fi switch (Windows), or the software toggle (Mac)This works differently on PCs and Macs. Windows: laptops (Dell, HP, Lenovo, etc.) sometimes have a hardware switch or Fn-key shortcut that disables Wi-Fi entirely — easy to bump by accident. A physical switch is usually a small slider or button on the side or front edge of the laptop, sometimes with a small Wi-Fi antenna icon next to it — slide or press it to make sure it's in the "on" position. More commonly, it's a function key instead: look along the top row of keys (F1-F12) for one with a Wi-Fi/antenna symbol on it (often shared with F2, F8, or F12 depending on the brand), and press it together with the Fn key in the bottom-left corner of the keyboard. You can also confirm Wi-Fi hardware is enabled by going to Settings > Network & Internet > Wi-Fi and checking the toggle at the top of that page. Mac: doesn't have a physical switch or a dedicated Wi-Fi function key — Wi-Fi is turned on and off entirely in software instead. Click the Wi-Fi icon in the top-right menu bar and confirm it's toggled on (or click it and choose "Turn Wi-Fi On" if it says off), or go to System Settings > Wi-Fi and check the toggle at the top of that page.
2. Disable and re-enable the Wi-Fi adapterWindows: Settings > Network & internet > Wi-Fi > toggle off, wait a few seconds, toggle back on (or right-click the network icon in the taskbar > open Network & Internet settings). Mac: System Settings > Wi-Fi > toggle off and back on. This resets the connection without a full restart.
3. Forget the network and rejoinWindows: Settings > Network & internet > Wi-Fi > Manage known networks > select network > Forget. Mac: System Settings > Wi-Fi > (i) next to the network > Forget This Network. Then reconnect and enter the password fresh.
4. Run the built-in network troubleshooterWindows: Settings > Network & Internet > Advanced network settings > Network troubleshooter (or right-click the Wi-Fi icon in the taskbar and choose Diagnose network problems). It walks through common fixes automatically and tells you what it finds. Mac: hold the Option key and click the Wi-Fi icon in the top menu bar, then choose "Open Wireless Diagnostics" (or open Spotlight, search "Wireless Diagnostics," and launch it from Applications > Utilities). Follow the on-screen prompts — it scans your connection and reports what's wrong in plain language.
5. Update the Wi-Fi adapter driver (Windows) or macOS (Mac)Windows: Right-click the Start button > Device Manager > Network adapters > right-click your Wi-Fi adapter > Update driver. Outdated network drivers are one of the most common causes of intermittent Wi-Fi failures on laptops, especially after a Windows update. Mac: macOS doesn't have separately updatable drivers the way Windows does — Apple bundles Wi-Fi hardware support directly into macOS itself. The equivalent fix is Apple menu > System Settings > General > Software Update, since that's the only way a Wi-Fi-related fix reaches a Mac.
6. Turn off power management for the Wi-Fi adapter (Windows) — this is one of the single most common causesBy default, Windows is allowed to shut off the Wi-Fi adapter to save battery, and it often does this too aggressively — disconnecting the connection every 20-40 minutes and sometimes requiring a restart to come back, which looks like a router or ISP problem but isn't. To fix: Device Manager > Network adapters > right-click your Wi-Fi adapter > Properties > Power Management tab > uncheck "Allow the computer to turn off this device to save power," then click OK. This one setting alone resolves the majority of random, repeating disconnects on Windows laptops. (Macs don't expose an equivalent adapter-level power setting, so this step is Windows-specific.) If disconnects continue after this, third-party antivirus or firewall software can occasionally interfere with Wi-Fi too — worth temporarily disabling it as a test if the problem persists.
7. Check if the router's 5GHz band is the problemSome older laptop Wi-Fi adapters don't support 5GHz at all — try connecting to the 2.4GHz network instead.
8. Reset the TCP/IP stackWindows: Settings > Network & internet > Advanced network settings > Network reset. Mac: System Settings > Wi-Fi > click the three-dot menu > Advanced, or remove and re-add the Wi-Fi service under System Settings > Network. This clears out corrupted network configuration.
9. Consider a USB Wi-Fi adapter, or that the laptop itself may be the problemA USB Wi-Fi adapter is a small stick that plugs into a USB port and gives the laptop a second, usually stronger, Wi-Fi antenna — sold at any electronics store or online for around $15-25. If your laptop's built-in Wi-Fi card is several years old and doesn't support 5GHz or current Wi-Fi standards, this inexpensive USB Wi-Fi adapter can often solve connection issues a driver update can't. But if the Wi-Fi hardware inside the laptop is failing — connections drop randomly regardless of location or router, or signal strength shows much weaker than other devices in the same room — no software fix will resolve that, and replacing the laptop (or at least its network hardware) is the real fix.

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