Camfecting（侵入设备的网络摄像头）是一种没有太多人关注的网络攻击形式。恶意程序或间谍软件(malicious program or spyware)可以感染您的网络摄像头并在您不知情的情况下记录您。因此，您应该始终注意使用网络摄像头的应用程序(apps using your webcam)。
计算机网络摄像头旁边的微型LED指示灯可以帮助确定您的网络摄像头是否被黑客入侵(determine if your webcam has been hacked)。每当应用程序激活您的网络摄像头时，它就会出现。但是，如果您的笔记本电脑的网络摄像头没有物理指示灯怎么办？或者网络摄像头LED出现故障并且不工作？你怎么知道相机在录制呢？
Windows操作系统附带一个虚拟屏幕显示 ( OSD )(OSD)通知，用作临时网络摄像头指示器。
每次应用程序激活（或停用）您的网络摄像头时，激活此功能将提示Windows向您发送通知。(Windows)默认情况下，所有Windows 10(Windows 10)设备 都禁用网络摄像头 OSD通知。(Webcam OSD)
在本指南中，我们将向您展示打开或关闭网络摄像头OSD通知的几种方法。
如何打开网络摄像头 OSD 通知(Webcam OSD Notifications)
激活此功能的选项隐藏在Windows 注册表(Windows Registry)中。我们概述了两种激活负责OSD通知的注册表文件的方法。
注意：(Note:) Windows注册表(Windows Registry)是敏感文件和设置的数据库。因此，在尝试启用相机开/关通知之前备份注册表非常重要。损坏任何注册表文件可能会损坏Windows 操作系统(Windows OS)并导致您的计算机出现故障。如果出现任何问题，备份可作为您的保险。本备份和恢复 Windows 注册表指南(guide on backing up and restoring the Windows Registry)包含您需要了解的所有内容。
方法一：手动修改 OSD 注册表文件(Method 1: Manually Modify the OSD Registry File)
1.使用Windows key + R快捷键启动Windows 运行(Windows Run)框。
2.在对话框中输入regedit并点击(regedit)OK。
3. 将以下路径粘贴到注册表编辑器的地址栏中，然后按键盘上的Enter 。
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\OEM\Device\Capture
找到标有 NoPhysicalCameraLED(NoPhysicalCameraLED)的键。如果您在此目录中找不到此密钥，请继续执行下一步以创建一个。否则，跳至步骤 6 更改其值。
4. 右键单击目录中的空白区域并选择New and DWORD (32-bit) Value。
5. 将新创建的密钥命名为NoPhysicalCameraLED并按Enter。
6. 双击NoPhysicalCameraLED项目或右键单击它并选择Modify。
7. 将数值数据更改为1，然后单击确定(OK)。
8. 关闭注册表编辑器。
通过修改NoPhysicalCameraLED注册表项的值，您将通知 Windows 您的网络摄像头缺少专用的物理LED。这将提示Windows Shell提供一种替代方法（屏幕上的指示器），让您知道网络摄像头何时开始或停止流式传输。
方法 2：创建注册表文件快捷方式(Method 2: Create a Registry File Shortcut)
这是一种更快的替代方法，需要创建一个带有注册表 ( .reg ) 扩展名的文本文件。此注册表文件将作为一个快捷方式，您可以通过单击按钮来启用和禁用OSD摄像头开/关通知。
1. 启动记事本(Notepad)并将以下内容粘贴到窗口中。
Windows 注册表编辑器版本 5.00 (Windows Registry Editor Version 5.00)
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\OEM\Device\Capture]
“NoPhysicalCameraLED”=dword:00000001
2. 按Control + Shift + S保存文件。
3. 为文件命名，在文件名末尾添加.reg扩展名——例如Enable-Camera-OSD.reg——然后点击保存(Save)。
4. 双击注册表文件以启用OSD通知。
5.在警告提示上单击是。(Yes)
6. 您将收到一条消息，说明键和值已成功添加到注册表。选择确定(OK)继续。
继续下一部分以测试网络摄像头(test the webcam)OSD 开/关通知。
OSD 摄像头通知(OSD Camera Notification Works)的工作原理
当您在计算机上启用摄像头激活和停用的 OSD 通知时，Windows将在每次应用程序激活您的网络摄像头时显示警报。这是它的工作原理。
启动任何需要访问您的摄像头才能工作的应用程序，例如Zoom、Microsoft Teams、Skype等。您可以在此处找到具有摄像头访问权限的应用程序的完整列表：设置(Settings )>隐私( Privacy )>摄像头( Camera)。
在您首选的应用上开始测试视频通话或会议。一旦您在通话窗口中打开视频，或者应用程序开始使用您的网络摄像头，您应该会在 PC 屏幕的左上角看到摄像头处于警报状态。(Camera on)
当应用程序停止使用您的网络摄像头时，会弹出相机关闭通知并在 5 秒内消失。(Camera off)
OSD 通知(OSD Notifications)不显示？检查这些
如果您的计算机在Windows 注册表中启用(Windows Registry)OSD通知后仍未显示相机(Camera)开/关警报，请尝试以下操作。
1.重启你的电脑(1. Restart Your Computer)
有时，在您重新启动计算机之前，对注册表所做的更改可能不会生效。确认您已更改NoPhysicalCameraLED注册表项，重新启动计算机，然后重试。
2.切换到管理员帐户(2. Switch to an Administrator Account)
您不能从标准或来宾帐户更改某些注册表项。如果您无法从注册表编辑器启用(Registry Editor)OSD摄像头通知摄像头，请确保您以管理员身份登录 Windows(signed in to Windows as an administrator)。转到设置(Settings )>帐户( Accounts )>您的信息( Your Info)，并确保该帐户具有管理员(Administrator)标签。
请参阅本指南以了解如何在 Windows 10 上将标准帐户更改为管理员帐户(change a standard account to an administrator account)。
不再需要 OSD 通知(Want OSD Notifications Anymore)？2关闭它的方法(Ways)
如果您不再需要 Windows 来显示屏幕上的相机通知，以下是关闭该功能的方法。
方法一：修改注册表(Method 1: Modify the Registry)
前往注册表并将NoPhysicalCameraLED键恢复为默认值。
双击NoPhysicalCameraLED键，将 Value 数据更改为0，然后选择OK。
方法 2：创建注册表文件快捷方式(Method 2: Create a Registry File Shortcut)
您还可以创建一个专用注册表文件，用作OSD网络摄像头通知的关闭按钮。启动记事本(Notepad)并按照以下步骤操作。
1. 将以下命令粘贴到记事本(Notepad)窗口中，然后按Control + Shift + S保存文件。
Windows 注册表编辑器版本 5.00 (Windows Registry Editor Version 5.00)
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\OEM\Device\Capture]
“NoPhysicalCameraLED”=dword:00000000
2. 为文件命名，在文件名末尾添加.reg扩展名——例如Disable-Camera-OSD.reg——然后点击Save。
3. 前往桌面（或保存文件的位置）并双击文件以禁用OSD通知。
4.在警告提示上单击是。(Yes)
额外的保护层
即使您的Windows PC 具有正常工作的网络摄像头指示器，您也应该考虑激活OSD摄像头通知。这是一个额外的安全系统，可以通知您网络摄像头被黑客入侵。
如果网络摄像头指示灯或OSD摄像头通知在您不进行视频通话或视频录制时偶尔亮起，则可能有无法识别的程序或浏览器扩展程序在后台使用您的网络摄像头。在这种情况下，最好使用 Windows Defender(run a scan with Windows Defender)或第三方扫描仪运行扫描。
How to Turn On Webcam On/Off OSD Notifications in Windows 10
Camfecting (hacking into a device’s webcam) is a fоrm of cyberattack that not too many peоple pay attention to. A malicious program or spyware can infect your webcam and record you without your knowledge. So, you should always be aware of the apps using your webcam.
The tiny LED indicator light next to your computer’s webcam can help determine if your webcam has been hacked. It comes on whenever an app activates your webcam. But what if your laptop’s webcam doesn’t have a physical indicator light? Or the webcam LED is faulty and doesn’t work? How do you know when the camera is recording?
The Windows operating system ships with a virtual on-screen display (OSD) notification that functions as a makeshift webcam indicator.
Activating this feature will prompt Windows to send you notifications every time an app activates (or deactivates) your webcam. Webcam OSD notification is disabled by default on all Windows 10 devices.
In this guide, we’ll show you several ways to turn webcam OSD notifications on or off.
How to Turn On Webcam OSD Notifications
The option to activate this feature is tucked in the Windows Registry. We’ve outlined two ways to activate the registry file responsible for OSD notifications.
Note: The Windows Registry is a database of sensitive files and settings. So, it’s important to make a backup of the registry before you attempt to enable camera on/off notifications. Damaging any registry file may corrupt the Windows OS and cause your computer to malfunction. A backup serves as your insurance should anything go wrong. This guide on backing up and restoring the Windows Registry has everything you need to know.
Method 1: Manually Modify the OSD Registry File
1. Launch the Windows Run box using the Windows key + R shortcut.
2. Type regedit in the dialog box and click OK.
3. Paste the path below in the Registry Editor’s address bar and press Enter on your keyboard.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\OEM\Device\Capture
Locate the key labeled NoPhysicalCameraLED. If you don’t find this key in this directory, proceed to the next step to create one. Otherwise, jump to Step 6 to change its value.
4. Right-click on a blank area in the directory and select New and DWORD (32-bit) Value.
5. Name the newly-created key NoPhysicalCameraLED and press Enter.
6. Double-click the NoPhysicalCameraLED item or right-click on it and select Modify.
7. Change the Value data to 1 and click OK.
8. Close the Registry Editor.
By modifying the value of the NoPhysicalCameraLED registry key, you’re informing Windows that your webcam lacks a dedicated physical LED. That will prompt the Windows Shell to provide an alternative—an on-screen indicator—that lets you know when your webcam starts or stops streaming.
Method 2: Create a Registry File Shortcut
This is a quicker alternative that entails creating a text file with a registry (.reg) extension. This registry file will serve as a shortcut you can use to enable and disable OSD camera on/off notifications at the click of a button.
1. Launch Notepad and paste the content below in the window.
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\OEM\Device\Capture]
“NoPhysicalCameraLED”=dword:00000001
2. Press Control + Shift + S to save the file.
3. Name the file, add the .reg extension at the end of the filename— e.g. Enable-Camera-OSD.reg— and click Save.
4. Double-click the registry file to enable OSD notifications.
5. Click Yes on the warning prompt.
6. You’ll get a message saying the keys and values have been successfully added to the registry. Select OK to continue.
Proceed to the next section to test the webcam OSD on/off notifications.
How the OSD Camera Notification Works
When you enable OSD notifications for camera activation and deactivation on your computer, Windows will show an alert every time an app activates your webcam. Here’s how it works.
Launch any app that needs to access your camera to work, e.g., Zoom, Microsoft Teams, Skype, etc. You can find a full list of apps with camera access here: Settings > Privacy > Camera.
Start a test video call or meeting on your preferred app. As soon as you turn on video in the call window, or as soon as the app starts using your webcam, you should see a Camera on alert at the top-left corner of your PC’s screen.
When an app stops using your webcam, a Camera off notification pops up and disappears within 5 seconds.
OSD Notifications Not Showing? Check These Out
If your computer doesn’t display the Camera on/off alerts despite enabling OSD notifications in the Windows Registry, try the following.
1. Restart Your Computer
Sometimes, changes made to the registry may not go into effect until you restart your computer. Confirm that you’ve changed the NoPhysicalCameraLED registry key, restart your computer, and try again.
2. Switch to an Administrator Account
You cannot make changes to certain registry keys from a standard or guest account. If you can’t enable OSD camera notifications camera from the Registry Editor, make sure you’re signed in to Windows as an administrator. Go to Settings > Accounts > Your Info and make sure the account has the Administrator label.
Refer to this guide to learn how to change a standard account to an administrator account on Windows 10.
Don’t Want OSD Notifications Anymore? 2 Ways to Turn It Off
If you no longer need Windows to display the on-screen camera notifications, here’s how to turn off the feature.
Method 1: Modify the Registry
Head to the registry and revert the NoPhysicalCameraLED key back to default.
Double-click on the NoPhysicalCameraLED key, change the Value data to 0, and select OK.
Method 2: Create a Registry File Shortcut
You can also create a dedicated registry file that’ll serve as a shutdown button for the OSD webcam notification. Launch Notepad and follow the steps below.
1. Paste the command below in the Notepad window and press Control + Shift + S to save the file.
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\OEM\Device\Capture]
“NoPhysicalCameraLED”=dword:00000000
2. Name the file, add the .reg extension at the end of the filename—e.g. Disable-Camera-OSD.reg—and click Save.
3. Head to the desktop (or wherever you saved the file) and double-click the file to disable OSD notifications.
4. Click Yes on the warning prompt.
An Extra Layer of Protection
Even if your Windows PC has a webcam indicator that works correctly, you should also consider activating the OSD camera notification. It’s an additional security system that notifies you of a webcam hack.
If the webcam indicator light or OSD camera notification comes on at odd times when you aren’t making a video call or video recording, there’s probably an unrecognized program or browser extension using your webcam in the background. In this case, it’s a good idea to run a scan with Windows Defender or a third-party scanner.
