Все способы:
- Способ 1: Использование других методов открытия
- Способ 2: Исправление или сброс приложения
- Способ 3: Установка недостающих пакетов через «PowerShell»
- Способ 4: Восстановление и переустановка через «PowerShell»
- Способ 5: Проверка системных обновлений
- Способ 6: Проверка целостности системных файлов
- Способ 7: Возвращение Windows 11 к исходному состоянию
- Вопросы и ответы: 1
Способ 1: Использование других методов открытия
Перед тем как вы перейдете к реализации более сложных методов, позволяющих восстанавливать работу «Защитника Windows» в Виндовс 11, советуем попробовать один из других вариантов открытия классического приложения. Возможно, у вас возникли проблемы только с конкретным методом или не удается найти нужную кнопку, поэтому альтернативные варианты могут оказаться полезными. Детальнее о них читайте в материале по следующей ссылке.
Подробнее: Как открыть Windows Defender в Windows 11
Способ 2: Исправление или сброс приложения
«Защитник Windows» является классическим приложением и представлен в ОС точно так же, как и другие стандартные программы. Для него тоже поддерживаются настройки и дополнительные параметры, среди которых можно отыскать сброс и исправление. Мы рекомендуем использовать эти инструменты в первую очередь, поскольку от вас требуется просто их запустить.
- Откройте «Пуск» и перейдите в «Параметры», кликнув по значку с изображением шестеренки.
- Далее в разделе «Приложения» выберите категорию «Приложения и возможности».
- В списке программ найдите «Безопасность Windows», справа в этой строке кликните по трем точкам для вызова меню, из которого выберите пункт «Дополнительные параметры».
- В блоке «Сбросить» сначала рекомендуем щелкнуть по «Исправить», чтобы запустить автоматический процесс восстановления.
- Если после него вы все еще не видите нужное вам приложение или испытываете трудности с его запуском, нажмите «Сброс», а по завершении повторите попытку перейти к стандартному антивирусу.
Способ 3: Установка недостающих пакетов через «PowerShell»
Этот вариант следует попробовать, если при выполнении предыдущего вы даже не нашли приложение с названием «Безопасность Windows». Это может означать, что оно просто отсутствует в операционной системе или файлы являются поврежденными. Для установки недостающих компонентов понадобится воспользоваться «PowerShell». Только учитывайте, что вместе с Защитником будут добавлены и пакеты других стандартных программ, отсутствующих в вашей сборке или удаленных вручную.
- Щелкните правой кнопкой мыши по «Пуску» и из появившегося контекстного меню выберите пункт «Терминал Windows (Администратор)».
- Введите команду
Set-ExecutionPolicy Unrestrictedдля получения списка недостающих пакетов. - После ее выполнения используйте
Get-AppXPackage -AllUsers | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}и нажмите Enter для применения. - Начнется процесс поиска и инсталляции файлов. Это может занять много времени, что зависит от количества отсутствующих пакетов и скорости вашего интернета. Как только вы увидите сообщение об успехе, попробуйте перезагрузить ПК и снова поискать Windows Defender на вашем компьютере.
Способ 4: Восстановление и переустановка через «PowerShell»
Следующий метод снова подразумевает использование консоли, но на этот раз команда будет всего одна и предназначена она исключительно для работы с «Защитником Windows». Она проверит его файлы, а при их отсутствии произведет повторную установку, что часто позволяет наладить работу стандартного компонента.
- Обязательно запускайте «Терминал Windows» от имени администратора, как это было показано в предыдущей инструкции.
- Введите команду
Get-AppxPackage Microsoft.SecHealthUI-AllUsers | Reset-AppxPackageи нажмите Enter для ее применения. - Через несколько секунд на экране должна появиться новая строка ввода. Это означает, что операция уже завершена, а вы можете переходить к проверке работы «Безопасности Windows».
Способ 5: Проверка системных обновлений
Сейчас очень активно выходят обновления для Windows 11, особенно это относится к различным апдейтам KB, связанным с безопасностью. Определенные из них вносят исправления в работу «Защитника Windows», что может вернуть компонент и наладить его запуск конкретно в вашем случае. Понадобится найти системные и необязательные обновления, затем произвести их инсталляцию.
- В «Параметрах» выберите раздел «Центр обновления Windows» и запустите процесс поиска апдейтов.
- Параллельно с этим можете перейти к просмотру необязательных обновлений, среди которых тоже могут быть патчи безопасности.
- Щелкните по списку «Необязательные обновления» для его открытия. Если апдейты будут найдены, отметьте их галочками и подтвердите инсталляцию (обновления драйверов в этом случае можно пропустить).
Способ 6: Проверка целостности системных файлов
Нередко причиной отсутствия или неудачного запуска «Защитника Windows» становятся поврежденные или отсутствующие системные файлы. Если ничего из перечисленного выше не помогло вам решить ситуацию, рекомендуем запустить системные утилиты, которые как раз и предназначены для сканирования и исправления подобных проблем. Детально о них рассказывает другой наш автор в своей статье по следующей ссылке.
Подробнее: Использование и восстановление проверки целостности системных файлов в Windows
Способ 7: Возвращение Windows 11 к исходному состоянию
Прибегать к реализации этого метода стоит в тех случаях, когда при помощи предыдущих вам так и не удалось вернуть «Защитник Windows» в операционную систему. Возможно, его установка изначально прошла неуспешно по каким-то причинам или вы используете пиратскую сборку ОС, где компонент просто отсутствует. Можете попробовать выполнить переустановку путем возвращения Виндовс к исходному состоянию. Для этого не нужны специальные программы, обойтись можно штатным средством.
Подробнее: Сброс Windows 11 к заводским настройкам
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This PowerShell command reinstalls Windows Defender in seconds
Updated on September 22, 2022
What to Know
- You don’t need to download Windows Defender, because it’s integrated into Windows 11.
- Enter this in a PowerShell window: Get-AppxPackage Microsoft.SecHealthUI -AllUsers | Reset-AppxPackage.
- Or, go to Settings > Apps > Installed apps > Windows Security > three dots > Advanced options > Reset.
This article explains when and how to reinstall Windows Defender through the command line or Settings app in Windows 11.
How to Reinstall Windows Defender in Windows 11
Windows Defender (aka, Microsoft Defender) isn’t installed on your computer like a typical program, so you can’t reinstall it like you can regular software. Instead, follow these directions to use a PowerShell command to get the job done. It might take anywhere from 5 seconds to a few minutes to complete. If you can open Settings normally, there’s an easier method after these steps.
-
Right-click the Start button and select Terminal (Admin).
If that doesn’t work for whatever reason, use the search bar on the taskbar to search for PowerShell, and then right-click it to find the Run as administrator option.
-
Copy the command exactly as it’s shown here, and then right-click in the PowerShell window to paste it (Ctrl+V works, too):
Get-AppxPackage Microsoft.SecHealthUI -AllUsers | Reset-AppxPackage -
Press Enter to immediately start the process to reset Windows Defender to its original settings so that it performs as a freshly installed app.
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You’ll know when it’s finished because you’ll see the blinking cursor again on a new line below the command you entered. In the meantime, you might briefly see a Deployment operation progress message.
If you see lots of red text, and an «Access is denied» message, return to step 1 and make sure you’re opening PowerShell as an administrator.
Another way to reset Windows Defender is through Settings. If Settings opens fine for you, you don’t need to bother with a PowerShell command. Instead, go to Settings > Apps > Installed apps > Windows Security > three dots > Advanced options > Reset.
When to Reinstall Windows Defender
Technically, you’re not really reinstalling the program because Windows doesn’t actually let you uninstall it. That said, you might run the above command to reset Windows Defender if it’s just not working correctly.
The most obvious sign you need to do this is if you see an error when you try to open it. If it’s not opening as it should, and you see this message, the above command should fix it right away:
You'll need a new app to open this windowsdefender linkLook for an app in the Microsoft Store
Or, maybe it does open, but some of its toggles won’t turn on or off, or you can’t even find a link to it on your computer. In these cases, the PowerShell command should refresh the tool back to working order.
Windows Defender Might Just Be Off
It’s possible that you’ve considered reinstalling Windows Defender because it isn’t catching malware, when in reality, it’s just not turned on. You might think it’s been uninstalled or is broken, but really it’s just disabled.
This is completely possible since Windows 11 lets you turn off its built-in antivirus program if you’d rather not use it.
Learn how to turn Windows Defender on and off for specific directions.
FAQ
-
Not really. While Windows Defender provides basic protection from threats, it’s no substitute for third-party antivirus software.
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Go to Start > Settings > Privacy & Security > Windows Security > Virus & threat protection. Under Virus & Threat Protection Settings, select Manage settings, then under Exclusions, select Add or remove exclusions.
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Windows Defender is the default anti-malware program on every Windows computer. Users complain that Windows Defender goes missing from their PCs for various reasons. These issues usually stem from conflicts with security programs or corrupted files. Interestingly, you can find effective ways to resolve the missing Windows Defender issue in just a few steps. Additionally, you can always look for alternatives to safeguard your data in any situation. Let’s tackle the problem of a missing Windows Defender.
See also:
Download Windows Defender
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Rapid Solution
Microsoft Defender is one of the leading anti-malware services available on Windows, and as such, it’s often referred to as Windows Defender. However, you might sometimes find that Windows Defender is missing from your computer.
You don’t want to miss out on the most powerful antivirus associated with Windows 11. Most importantly, it’s a crucial tool for safeguarding your computer from various threats like viruses, malware attacks, spyware, and more. If Windows Defender isn’t working, there’s no need to panic. This article will provide you with a list of simple solutions to fix the missing Windows Defender issue on your Windows 11 PC.
Reasons for the Absence of Windows Defender in Windows 11
The best approach to fixing issues with Windows Defender is to identify the root cause. Why isn’t Windows Defender protecting your system from malicious threats? The most common reasons for its absence include deleted Windows Defender files or conflicts with other security programs. Here are some additional possible causes:
1. Disabled Windows Defender: It might have been inadvertently disabled through Group Policy settings or service configuration.
2. System update issues: If your operating system is missing crucial updates, Windows Defender may not function correctly.
3. Compatibility problems: Some older software or drivers might not be compatible with Windows Defender.
4. Virus or malware infection: Malware can prevent Windows Defender from running to avoid detection.
5. Incorrect registry settings: Registry entries related to Windows Defender might have been modified or deleted.
6. Third-party security software conflict: Installing another antivirus program could lead to Windows Defender disabling itself automatically.
7. System restore or reset: If you recently performed a system restore or reset, Windows Defender might be missing or misconfigured.
To resolve the issue, try these steps:
1. Check and enable Windows Defender: Go to «Settings» > «Update & Security» > «Windows Security» and ensure «Virus & threat protection» is enabled.
2. Update your system: Make sure your operating system has all the latest updates installed.
3. Scan for malware: Use a trustworthy alternative security tool to perform a full system scan for malware.
4. Review Group Policy settings: If you have administrator privileges, check the relevant Windows Defender settings in the Group Policy Editor.
5. Repair the registry: Proceed cautiously with the Registry Editor or use a system restore point to revert to a pre-issue state.
6. Uninstall third-party security software: If you have other antivirus software installed, try uninstalling it to see if that resolves the problem.
7. Contact Microsoft Support: If none of the above steps help, consider reaching out to Microsoft’s official support for assistance.
- Your Windows 11 is not up to date with the latest updates.
- The date and time on your computer are incorrect.
- You have manually disabled Windows Defender.
- A system configuration issue is preventing Windows Defender from starting.
- Windows Defender has been disabled through Group Policy.
Related reading: Windows 11 Virus and Threat Protection not working
For example, if you have newly installed an antivirus, it might interfere with the working of Windows Defender. Usually, you will find the following common reasons behind the invisibility of Windows Defender on your system:
Comprehensive Analysis: Does Windows 11 Need Antivirus Software?
Although it comes with Windows Defender, antivirus software is crucial for safeguarding against malware and malicious attacks! Consider using Todo Backup tools for all-round computer protection.
How to Fix the Missing Windows Defender Issue in Windows 11
As you can see, the reasons behind the absence of Windows Defender are quite insignificant. With a keen eye for detail, you can identify these causes and address them through straightforward troubleshooting steps. For instance, you might first attempt to reset Windows Defender. However, if simple remedies don’t yield the desired outcome, you can try the following solutions.
- Method 1: Reactivate Windows Defender if it’s Disabled
- Method 2: Restart Your System
- Method 3: Check for System Updates
- Method 4: Download and Run the Microsoft Safety Scanner
- Method 5: Reinstall Defender from the Microsoft Website
Method 1: Re-enable Windows Defender if It’s Disabled
If Windows Defender was disabled accidentally, you can manually enable it by following these steps:
Step 1: Open Settings and go to Privacy & Security.
Step 2. Select Windows Security, and then click Virus & threat protection.
Step Three: Click the “Manage settings” link and turn on “Use real-time protection with Windows Defender.”
Method 2: Restart Your System
For almost any problem, one of the standard solutions is to restart the system. Here are some simple steps to do that.
Step one: Save all your work.
Step 2: Click the «Start» button.
Step 3: Then click the “Power” button, and select the “Restart” option.
Method 3: Check for System Updates
Outdated updates can also cause Windows Defender to stop working on your system. Here are some simple steps to check for Windows updates:
Step 1: Open the Windows Settings using the “Win” and “I” keys.
Step 2: Click on “Windows Update” on the left side of the screen.
Step Three: Look for an “Check for Updates” option and click it to manually run Windows Update.
Method 4: Download and run the Microsoft Safety Scanner
Microsoft Safety Scanner is a powerful tool designed to detect and remove malware from your Windows system. You can download and run the scan by following these steps:
Step 1: Download the Microsoft Safety Scanner from the official Microsoft Support website, and follow the instructions to install it.
Upon completing the installation process, you will be presented with three different scan options: Quick Scan, Full Scan, and Custom Scan.
Step 3: Depending on the type of scan you chose, the Microsoft Safety Scanner will take a few minutes to complete the scan.
Method 5: Reinstall Defender from the Microsoft website
If all else fails, you might need to resort to reinstalling Windows Defender, which isn’t available directly from Microsoft’s website, but can be downloaded using the Windows Terminal or PowerShell.
Step 1: Open the Windows Terminal as an administrator.
Step 2: Copy and paste the command below, then press Enter.
Get-AppxPackage Microsoft.SecHealthUI -AllUsers | Reset-AppxPackage
Step 3: It will install and fix anything related to Windows Defender.
When it’s done, search for Windows Defender in the Start menu, open it, and make sure Real-Time Protection is enabled.
Protect your data from viruses even without Windows Defender
The absence of Windows Defender can have severe consequences for your computer. Without the default anti-malware protection, your system is likely more vulnerable to virus and malware attacks. However, it’s worth noting that regardless of whether you address the issue with Windows Defender, your data might still be at risk.
That’s why you should take care of your data protection with priority. Todo Backup tool provides a unique opportunity to keep your data backed up and safe without any worries.
AOMEI Backupper is a powerful one-stop data backup solution that easily backs up your data from disks, files, operating systems, and partitions, and stores them according to your preference. It also ensures easier data recovery, giving you full control over your data. However, the most notable feature of AOMEI Backupper is its so-called Security Zone. This is a tool that creates a hidden partition on your computer that cannot be explored or modified by users, third-party applications, or the Windows system itself. This feature allows AOMEI Backupper to help protect your crucial data from ransomware attacks.
Even without Windows Defender, you can follow these steps to keep your data safe from viruses.
Step 1: Choose What to Back Up
On the main screen, click the big question mark button to choose what to back up. You can pick individual files, whole disks or partitions, operating systems, and mail.
Step 2: Choose a secure location for your backup destination
When choosing a location to back up to, you’ll see the option for “Safe Place.” Click on Safe Place to use it as your backup location.
If you’ve never used a Safe Zone before, Todo Backup will prompt you to create one. Click Create Safe Zone.
Click Create Safe Area.
Choose a partition with enough space to store the backup, and click Continue.
Select a partition to create a security zone
You can adjust the size of the reservation, and click Create to finish the setup.
Resize partitions to create a safety zone
Step 3: Run the backup job
Click Backup Now to start the backup. Your system, files, disks, and emails in the Safety Zone will be fully protected from viruses, ransomware, and trojans.
Bottom line
The unexpected disappearance of Windows Defender can be frustrating and troublesome, as it leaves your valuable data vulnerable to potential malware attacks, viruses, or other threats if left unaddressed. Hence, it’s crucial to identify the root cause, such as conflicting security programs. You then need to undertake necessary troubleshooting steps to ensure Windows Defender is functioning properly. Most importantly, you can utilize tools like Todo Backup to secure your data with reliable backup, a robust data backup and recovery solution.
Every Windows computer comes with Windows Defender as its anti-malware tool by default. It is like the first line of defense in your Windows PC against malware/viruses. Although it has been found in many cases that the Windows defender is not showing up or Windows defender is missing on Windows 11/10 PCs.
One of the many issues users encounter while using Microsoft’s built-in antivirus on their system is that they can’t find Windows defender on their PC/laptops. Users have previously expressed dissatisfaction with Windows 11 Defender being disabled. However, several users were unable to locate the software at all on their PC.
Why Is There No Windows Defender On My Windows 11 PC
If you are wondering why don’t you have Windows defender on your Windows 11 PC?
- This could be due to many reasons including malware invasion and service issues.
- Additionally, modifications to the registry that disable Windows Defender could be the root of the problem.
With all said, now let us see the possible fixes for the issue.
Read Also: Is Windows Defender Good Enough For PC Protection
How to Fix Windows Defender Missing on Windows 11/10 PC
This article describes how to install Windows Defender on Windows 11/10 PC/laptops using the Settings app or PowerShell. So without further ado, Let’s get started.
Method 1: Install Windows Defender via PowerShell
You cannot install Windows Defender like you can other programs since it is not installed on your PC in the same way as other programs. Instead, utilize a PowerShell code to complete the task by following these instructions. It can take five seconds to several minutes to finish.
- Press the Windows key with the key X to open the WinX
- Now from the list, choose Windows terminal (Admin).
- Then paste these exact commands and press the Enter key after each command:
Set-ExecutionPolicy Unrestricted
Get-AppXPackage -AllUsers | Foreach {Add-AppxPackage-DisableDevelopmentMode – Register “$($_.InstallLocation) \AppXManifest.xml”}.
All default Windows applications can be reinstalled with the command above. This is extremely helpful if a file error during an update prevented Windows Defender from being installed on Windows 11.
Read Also: What To Do If Windows Defender Keeps Saying Threats Found
Method 2: Repair and install Windows Defender
Windows Defender can occasionally be installed improperly or incompletely. In Windows 11, the command listed below will disassemble every component of the computer and reinstall it from the scratch.
- Press the Windows key with the key X to open the WinX
- Now from the list, choose Windows terminal (Admin).
- Then paste this exact command and press the Enter key:
Get-AppxPackage Microsoft.SecHealthUI-AllUsers | Reset-AppxPackage
Read Also: How To Enable Ransomware Protection In Windows Defender?
Method 3: Reset Windows Defender
- Press the Windows key with the key I to open Settings and click on
- Now click on Default Apps.
- Scroll down to the bottom of the page and click Reset in front of Reset all default apps.
Read Also: How To Clear The Windows Defender Protection History On a PC
To Wrap This Up
So, in this way you can fix this Windows Defender missing on Windows 11/10 PCs. Contrary to several other problems, this one is simple to resolve, as was just explained above. We sincerely hope that this useful advice will help you reactivate Windows Defender to safeguard your computer.
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Next Read: 5 Solutions to Fix the “Windows Defender Failed to Initialize” Issue