Wi-Fi Adapter Not Working on Windows: How to Fix a Missing, Disabled or Unstable Adapter

When the Wi-Fi adapter misbehaves, Windows can lose the Wi-Fi option entirely, show no networks, or keep dropping the connection while every other device in the house is fine. This guide covers both built-in adapters and USB or PCIe adapters you added yourself, following Microsoft’s and TP-Link’s troubleshooting steps. If other devices also have problems, the router is the more likely culprit; see Wi-Fi not working.

Which Symptom Do You Have?

• No Wi-Fi option in the taskbar or Settings — Windows does not see a working adapter.
• The adapter is there but finds no networks — or not yours.
• It connects but drops or is slow.
• It connects but has no internet — usually not the adapter; see Wi-Fi connected but no internet.

No Wi-Fi Option at All

Check airplane mode and the Wi-Fi switch. Settings → Network & internet: airplane mode off, Wi-Fi on. Some laptops also have a function key or a physical switch for wireless.

Open Device Manager (right-click Start → Device Manager) and expand Network adapters:

• Adapter listed with a down arrow: it is disabled. Right-click → Enable device.
• Adapter listed with a yellow warning sign: the driver has a problem. Open Properties to see the error, then see the driver section below.
• No wireless adapter listed: choose Action → Scan for hardware changes. If it still does not appear, look under “Other devices” for an unknown network controller, which means the driver is missing.

Restart, not shut down. Windows Fast Startup can keep a hung adapter in the same state after a shutdown; a restart reloads it completely.

Driver Problems

Reinstall the driver. In Device Manager, right-click the wireless adapter → Uninstall device (check the option to remove the driver if offered), then restart. Windows reinstalls a driver automatically. Microsoft recommends downloading the latest driver from the PC maker first, so you can install it if Windows cannot find one — on another computer and a USB stick, if this PC has no internet.

Roll back after an update. If Wi-Fi broke after a Windows or driver update, open the adapter’s Properties → Driver → Roll Back Driver, if available.

Get the right driver. For built-in adapters, use the laptop or motherboard maker’s support page for your exact model. Chip makers such as Intel also publish current Wi-Fi drivers. For USB adapters, use the adapter maker’s download page for your model and hardware version.

Network reset as a last software step: Settings → Network & internet → Advanced network settings → Network reset. It removes and reinstalls all network adapters and returns their settings to defaults; VPN software may need to be set up again.

The Adapter Finds No Networks

Check the WLAN AutoConfig service. TP-Link’s troubleshooting points to this when an adapter finds no Wi-Fi at all: open Services (search for “services”), find WLAN AutoConfig, set Startup type to Automatic and start it.

Check the bands. An adapter that supports only 2.4 GHz cannot see a 5 GHz-only network, and older adapters cannot see 6 GHz networks. See 2.4 GHz vs 5 GHz.

Only one network is missing? TP-Link suggests changing the router’s network name and channel as a test — for example channel 1 on 2.4 GHz and channel 36 on 5 GHz — because some adapters do not support certain channels. See the best Wi-Fi channel. A hidden network name has to be added manually; see should you hide your Wi-Fi network.

The Connection Drops or Is Slow

Turn off power saving for the adapter. TP-Link’s first step for unstable connections: Device Manager → adapter Properties → Power Management → uncheck Allow the computer to turn off this device to save power. On laptops, also set the power mode to balanced or best performance while testing.

Move closer to the router to rule out a weak signal; see how to check Wi-Fi signal strength.

Check the link speed. In the Wi-Fi network properties, Windows shows the link speed. TP-Link considers a speed test result of about 30–50% of the link speed normal for Wi-Fi. If a phone in the same spot is much faster than the PC, the adapter or its driver is the problem.

Interference from USB 3 devices and other wireless gear can affect a nearby adapter; see Wi-Fi interference.

Extra Steps for USB Wi-Fi Adapters

Disable the old built-in adapter. TP-Link notes that when you add a USB or PCIe adapter to a laptop with built-in Wi-Fi, you should disable the original adapter in Device Manager first, so the two do not conflict.

Use a different USB port, preferably directly on the computer rather than a hub. Some adapters need a USB 3 port for full speed.

Use the included USB extension cable if there is one: placing the adapter higher and away from the back of a desktop PC and its metal case greatly improves reception.

Install the maker’s driver before plugging the adapter in, if the instructions say so; many adapters work out of the box on Windows, but not all.

Desktop PCIe cards: make sure the antennas are attached and the card is seated firmly.

When the Adapter Is Faulty

If the adapter does not appear in Device Manager after a scan, a clean driver install and a network reset — or works on another computer but not this one — it may be a hardware fault or a disabled BIOS setting. Check the BIOS or UEFI for a wireless option, contact the laptop maker, or use a USB Wi-Fi adapter as an inexpensive replacement. A network cable is the quick way to stay online meanwhile.