How to Prevent Windows from Turning Off USB Webcam to Save Power

USB selective suspend is a Windows power-saving feature that can cut power to a webcam it misjudges as idle, even during genuinely active use in some driver and hardware combinations. Disabling it specifically, through Power Options' advanced USB settings, keeps your webcam continuously powered without meaningfully affecting your broader overall battery life.

Disabling USB Selective Suspend in Windows

Windows monitors USB device activity and can selectively suspend power to individual devices it determines aren't currently being actively used, specifically to conserve battery on laptops — a genuinely sensible feature for most peripherals most of the time, but one that can occasionally misjudge an actively streaming webcam as idle due to how certain drivers report their own activity status back to Windows.

When this misjudgment happens, the practical result is a webcam that unexpectedly loses power and disconnects mid-use, despite being actively needed at that exact moment — confusing and disruptive, but resolved reliably once you know exactly which specific setting is responsible and how to address it directly.

Step-by-Step Setup

Step 1: Open Control Panel → Power Options

(or search "Edit power plan" in the Start menu).

Step 2: Click "Change plan settings"

Next to your currently active power plan, then "Change advanced power settings."

Step 3: Expand "USB settings," then "USB selective suspend setting."

Step 4: Set both "On battery" and "Plugged in" to Disabled.

Step 5: Click Apply and OK

Then restart your computer to ensure the change fully takes effect. ↑ Confirm sustained connection with the widget above during an extended test.

Disabling this specifically for USB power management has a genuinely minimal impact on overall battery life for most users, since it affects a narrow slice of total system power draw compared to your display and CPU.

Checking It Applied to the Right Device

This specific setting applies globally to USB power management across your system rather than targeting one device individually, meaning it's a single change covering your webcam alongside every other USB device connected to your computer — genuinely convenient in that it requires only one adjustment, though worth knowing since some more advanced users specifically want to disable it only for select devices, which requires a more targeted approach through Device Manager instead.

If you want to preserve selective suspend for other devices while disabling it specifically for your camera, Device Manager's own per-device Power Management tab, covered elsewhere on this site, offers that more granular, individual-device control instead of this broader system-wide setting.

Confirming the Change Took Effect

After restarting, briefly checking the same advanced power settings menu again confirms your change was saved correctly rather than silently reverting — occasionally a Windows Update or driver refresh can reset power management settings back to their defaults, so a quick periodic check is a reasonable habit if you notice the disconnection issue returning after a system update.

If the setting reverts repeatedly despite reapplying it, checking for a driver update specifically for your USB controller, alongside your camera's own driver, is worth doing as a further step.

A Few More Things to Check on Windows

How do I reset the Windows Camera app itself?

Go to Settings → Apps → Installed apps, find Camera, open its three-dot menu, and choose Advanced options → Reset. This clears the built-in Camera app’s own cache and settings without uninstalling it, which can fix a stuck, frozen, or permanently black preview even when the underlying device and driver are both working correctly. It only resets that one app — not your camera driver, and not other applications that use the camera.

Could my antivirus be silently blocking my camera?

Many third-party security suites — Bitdefender, Kaspersky, Norton, and ESET among others — include their own webcam-protection feature that runs independently of Windows’ own privacy settings. That means Windows can show camera access as fully permitted while the antivirus software blocks it anyway, at a layer Windows has no visibility into. Check the antivirus program’s own settings, usually under a Privacy, Webcam Protection, or similarly named section, and confirm your browser or conferencing app is on its allow-list.

How do I re-enable my camera in Device Manager if it's disabled?

Right-click the Start button → Device Manager, expand Cameras or Imaging devices, and look for a greyed-out icon or a small down-arrow badge. Right-click that entry and choose Enable device. This is a different action from updating a driver — a disabled device won’t respond to any other fix until it’s explicitly re-enabled here first, so it’s worth checking before assuming the problem is a driver or a permission.

Is Windows' own camera privacy toggle blocking access, separately from anything else?

Windows keeps a system-level camera permission at Settings → Privacy & security → Camera, completely separate from Device Manager, the Camera app, and any antivirus software. This one screen has a master Camera access switch plus a per-app list beneath it — both need to be on. It’s worth checking directly, since a camera can show as fully enabled and working in Device Manager while this toggle silently blocks every app from reaching it.

After resolving the hardware side, the main camera test will confirm resolution, frame rate, and mic are all reporting correctly.