How to Fix USB Device Descriptor Request Failed Error for Webcams

Every USB device, when first connected, has to respond to a standard identification request from the operating system — its "descriptor" — containing basic information like its vendor, product name, and capabilities, which Windows needs before it can load an appropriate driver and treat the device as usable.

When this specific request fails, Windows is left with a connected device it fundamentally cannot identify, which is a more basic and earlier-stage failure than a driver simply malfunctioning after successful identification — the device essentially never gets past the very first handshake step of being recognized at all.

This kind of failure is most commonly caused by something physically or electrically marginal in the connection itself — a failing USB port, cable, or hub — rather than a deeper software configuration issue, since the failure happens before any driver-specific code even has a chance to run.

Step 1: Try a different USB port

Ideally connected directly to your computer rather than through a hub.

Step 2: Try a different, known-good USB cable

If your camera uses a detachable one.

Step 3: In Device Manager, uninstall the device entirely

— right-click → Uninstall device, checking "Attempt to remove the driver" if offered — then restart your computer to force a completely fresh enumeration attempt.

Step 4: Test the camera on a completely different computer

If the previous steps don't resolve it, which helps confirm whether the camera hardware itself has failed versus something specific to your current system. ↑ Confirm success with the widget above.

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.