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How to Fix Wi-Fi Adapter and USB Devices Disconnecting

Steve K Sep 28, 2026 871 views

Question details

The user needs to resolve an issue where a USB Wi-Fi adapter repeatedly disconnects and causes other USB peripherals to stop functioning.

How to Fix Wi-Fi Adapter and USB Devices Disconnecting

Product: USB Wi-Fi Adapter
Device & OS: Windows
Scenario: Using a computer with a USB Wi-Fi adapter alongside other essential USB devices like a keyboard and mouse.
Observed behavior: The USB Wi-Fi adapter disconnects randomly, causing the mouse and keyboard to fail. Driver updates have not fixed the problem, but using an Ethernet connection reduces the issue.

Before you start

Before altering system settings, try plugging the Wi-Fi adapter into a different USB port (preferably directly on the motherboard) to rule out a faulty port or USB hub.

Solution 1Recommended

Disable USB Selective Power Saving

Windows may be turning off your USB root hubs or Wi-Fi adapter to save power, causing the disconnections.

Windows includes a power-saving feature that selectively suspends USB devices. If it mistakenly suspends your Wi-Fi adapter or the hub it connects to, all devices on that hub can drop offline.

Open Device Manager

Right-click the Start button and select Device Manager from the menu.

Adjust USB Root Hub Settings

Expand the 'Universal Serial Bus controllers' category. Right-click 'USB Root Hub' and select 'Properties'. Go to the 'Power Management' tab and uncheck 'Allow the computer to turn off this device to save power'. Repeat this for all USB Root Hub entries.

Adjust Network Adapter Settings

Expand the 'Network adapters' category. Find your USB Wi-Fi adapter, right-click it, select 'Properties', navigate to the 'Power Management' tab, and uncheck the same power-saving option.

Restart Required: After changing these settings, restart your computer to ensure the new power management policies take effect.

Solution 2

Run System File Checker (SFC) Correctly

Use this to repair missing or corrupted Windows system files that might be causing hardware communication errors.

Solution 3

Update System Chipset and USB Drivers

Ensure your motherboard's USB controllers and chipset are running the latest software.

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Frequently Asked Questions

Why does a disconnecting Wi-Fi adapter cause my mouse and keyboard to freeze?

If your Wi-Fi adapter and your peripherals share the same internal USB Root Hub on your motherboard, an error or power suspension on the Wi-Fi adapter can cause the entire hub to reset, temporarily disconnecting your mouse and keyboard.

Why didn't the 'sfc /scannow' command work when I ran it?

The System File Checker requires administrative privileges. If you run it from the basic Windows Run dialog, it may briefly flash and close. You must right-click the Command Prompt app and select 'Run as administrator' for it to function correctly.

Should I modify DCOM permissions or Group Policy to fix USB issues?

No. Altering DCOM permissions or Group Policy is generally unrelated to USB power management or hardware drops. Making incorrect changes in these advanced areas can cause further system instability.

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