A Wi-Fi adapter that switches itself off
How do I fix a Wi-Fi adapter that keeps disabling itself?
Written by The CommonFixes team · fact checked by CommonFixes review desk
Last updated
Short answer
Windows is allowed to switch network hardware off to save battery, and on a lot of laptops it takes that permission far too literally. The adapter is powered down during sleep or idle and never wakes properly. A stale driver and the fast startup feature make the same thing happen at every boot rather than at every sleep. The quickest thing to try first: stop windows turning the adapter off to save power — Press the Windows key and X, choose Device Manager, expand Network adapters, right click your wireless adapter and choose Properties. On the Power Management tab, untick Allow the computer to turn off this device to save power and click OK. This single setting solves the majority of adapters that vanish after sleep. Most people are done in about 15 minutes.
Full walkthrough below: 6 steps for Windows, rated easy.
Sounds like this
- •The Wi-Fi icon disappears and only Ethernet is left
- •Turning the adapter back on works until the next sleep
- •Device Manager shows the adapter with a small arrow on it
Why it happens
Windows is allowed to switch network hardware off to save battery, and on a lot of laptops it takes that permission far too literally. The adapter is powered down during sleep or idle and never wakes properly. A stale driver and the fast startup feature make the same thing happen at every boot rather than at every sleep.
Work through these in order
0% done- 1
Stop Windows turning the adapter off to save power
Press the Windows key and X, choose Device Manager, expand Network adapters, right click your wireless adapter and choose Properties. On the Power Management tab, untick Allow the computer to turn off this device to save power and click OK. This single setting solves the majority of adapters that vanish after sleep.
- 2
Set the wireless adapter to maximum performance
Open Control Panel, Power Options, Change plan settings, Change advanced power settings, then Wireless Adapter Settings and Power Saving Mode. Set both On battery and Plugged in to Maximum Performance. On battery saving mode the radio drops out under load and Windows sometimes disables it rather than reconnecting.
- 3
Turn off fast startup
Open Control Panel, Power Options, Choose what the power buttons do, click Change settings that are currently unavailable and untick Turn on fast startup. Fast startup restores a saved snapshot of the drivers instead of loading them fresh, and a network driver that was half asleep in that snapshot comes back disabled.
- 4
Reinstall the driver from the laptop maker, not from Windows Update
In Device Manager right click the adapter, choose Uninstall device and tick Delete the driver software for this device, then restart. Before you do that, download the wireless driver for your exact model from the maker support page onto the desktop, or from Intel if it is an Intel AX or BE adapter, and install it after the restart. The generic driver Windows fits by itself is the version that misbehaves most.
- 5
Check the physical switch and the airplane mode key
Some laptops have a slider on the side or an F key with an aerial symbol that cuts the radio in hardware. A knock against a bag can flip it. Press the key once, and in Settings, Network and internet, check that airplane mode is off and that Wi-Fi is not set to turn back on after an hour.
- 6
Run the network reset as the last software step
Open Settings, Network and internet, Advanced network settings, Network reset, then click Reset now. It removes every adapter and reinstalls them cleanly after the restart. Write your Wi-Fi password down first, because saved networks and any VPN settings are cleared as well.
If none of that worked
If the adapter still disables itself, plug in a small USB Wi-Fi dongle for a day. When the dongle stays connected without fail, the internal card or its aerial connector is loose, which is common after a repair or a battery replacement, and reseating the card fixes it. Check Event Viewer under Windows Logs, System for a warning at the exact time it drops, since it names the driver responsible.
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The CommonFixes team
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This guide was last updated on 13 August 2026. If a step no longer matches what you see on screen, tell us on the contact page and we will test it again.
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