How to Fix MediaTek Wi-Fi Not Working on a Laptop (Step by Step)

MediaTek Wi-Fi adapters — the MT7921, MT7922, and MT7961 found in millions of budget and midrange laptops — have a reputation for flaky wireless that is only partly deserved. The hardware is fine; the drivers shipped at launch were not, and Windows Update has a habit of reinstalling older, buggier versions over the fixed ones. The result is the familiar pattern: Wi-Fi works, then drops, then vanishes, then works again.

This guide treats MediaTek Wi-Fi as the driver problem it almost always is. You will verify the adapter is present, install the correct driver, fix the power and roaming settings that trigger disconnects, and lock the working driver in place so updates stop breaking it.

Why this happens

• Buggy launch-era drivers: Early MediaTek Wi-Fi 6 drivers had documented disconnect and resume-from-sleep bugs that were fixed only in later releases.
• Windows Update driver downgrades: Windows may replace your working OEM driver with an older generic one, reintroducing fixed bugs.
• Aggressive power management: Windows turns the adapter off to save power and the MediaTek chip sometimes fails to wake cleanly.
• Band steering conflicts: Routers that merge 2.4GHz and 5GHz under one name can confuse the adapter’s roaming logic into endless reconnect loops.
• Corrupted driver state after sleep: Resume-from-sleep is the single most common trigger for MediaTek disconnects.
• Antenna or hardware issues: Rare, but a loose antenna lead (usually after a repair) shows up as weak signal rather than total failure.
• Router-side incompatibilities: Some routers’ 802.11ax features interact badly with older MediaTek firmware; disabling ax on the router is a valid test.
• VPN or filter drivers: Third-party network filter drivers can wedge the adapter’s data path even when the radio itself is fine.

How to fix it

Work through these in order — diagnose first, then act.

Fix 1: Confirm the adapter exists and is enabled

1. Press Win + X → Device Manager → Network adapters and look for a MediaTek Wi-Fi entry.
2. If it has a down-arrow, right-click → Enable device.
3. If it is missing entirely, click Action → Scan for hardware changes and watch for it to appear.
4. Check the physical wireless switch or Fn + wireless key on your laptop — some models have a hard kill switch that overrides everything.

Fix 2: Install the correct OEM driver

1. Go to your laptop manufacturer’s support page (not MediaTek’s generic site) and download the latest Wi-Fi driver for your exact model.
2. In Device Manager, right-click the MediaTek adapter → Uninstall device, checking “Attempt to remove the driver” if offered.
3. Restart, then run the OEM installer as administrator and restart again.
4. Verify the driver date in Properties → Driver is recent. OEM drivers carry antenna and power calibrations that generic drivers lack — the same principle behind fixing Intel AX201 issues with vendor packages.

Fix 3: Disable power management on the adapter

1. In Device Manager, right-click the MediaTek adapter → Properties → Power Management.
2. Uncheck “Allow the computer to turn off this device to save power”.
3. Go to Settings → System → Power & battery → Power mode and set it to Best performance while testing.
4. Also check Control Panel → Power Options → Change plan settings → Change advanced power settings → Wireless Adapter Settings → Power Saving Mode and set it to Maximum Performance on both battery and plugged in.

Fix 4: Tune the adapter’s advanced settings

1. In the adapter’s Properties → Advanced tab, find Roaming Aggressiveness and set it to 1. Lowest if you stay near one router — this stops pointless roaming disconnects.
2. Set Preferred Band to 5GHz (or 2.4GHz if you are far from the router) instead of Auto, to stop band-hopping drops.
3. If you see 802.11a/b/g Wireless Mode options, try limiting to 802.11ac if your router’s ax implementation seems to trigger the drops.
4. Click OK and test for a full day before judging — some fixes only prove themselves over time.

Fix 5: Reset the network stack

1. Open Settings → Network & internet → Advanced network settings → Network reset and choose Reset now.
2. Restart when prompted. This reinstalls all network adapters and clears corrupted TCP/IP and Winsock state.
3. Reconnect to your Wi-Fi network afterward — you will need the password again.
4. For a manual approach, run in an elevated Command Prompt: netsh winsock reset and netsh int ip reset, then restart.

Fix 6: Rule out the router

1. Test the laptop on a different network — a phone hotspot is perfect for this.
2. If Wi-Fi is stable on the hotspot but not your router, log into the router and try disabling 802.11ax / Wi-Fi 6 mode or band steering.
3. Update the router’s firmware; older firmware plus newer client drivers is a classic mismatch.
4. Try a different Wi-Fi channel to rule out interference, especially on crowded 2.4GHz.

Fix 7: Stop Windows from replacing the driver

1. Once Wi-Fi is stable, set Device Installation Settings to No (System → About → Advanced system settings → Hardware).
2. This blocks Windows Update from reinstalling the older generic MediaTek driver that caused the original problem.
3. Check Microsoft support for the “show or hide updates” tool if a specific update keeps reappearing — the same technique used when driver updates keep failing .

Fix 8: Check for hardware failure

1. Boot a Linux live USB — if Wi-Fi works flawlessly there, your hardware is fine and Windows is the problem.
2. Run your laptop maker’s built-in wireless diagnostics (many have one in BIOS or a support app).
3. If the adapter never appears in Device Manager even after a scan and BIOS shows wireless enabled, the card itself may have failed — on many laptops the Wi-Fi card is a replaceable M.2 module.

Closing

MediaTek Wi-Fi problems are driver problems wearing a hardware costume. The winning formula is consistent: install the laptop maker’s latest driver, turn off the power-saving features that put the adapter to sleep, simplify the roaming decisions it has to make, and then lock that working driver in place so Windows Update cannot undo your work.

Frequently asked questions