Microsoft continually updates security intelligence in antimalware products to cover the latest threats and to constantly tweak
detection logic, enhancing the ability of Microsoft Defender Antivirus and other Microsoft antimalware solutions to accurately
identify threats. This security intelligence works directly with cloud-based protection to deliver fast and powerful AI-enhanced,
next-generation protection.
Microsoft security intelligence updates include software that incorporates material from third parties.
Third-party notices and information
Automatic updates
To help ensure your antimalware solution detects the latest threats, get updates automatically as part of Windows Update.
If you are having problems with Windows Update,
use the troubleshooter.
If you don’t already use Microsoft Defender Antivirus,
learn how to turn it on.
Trigger an update
A manually triggered update immediately downloads and applies the latest security intelligence. This process might also address problems with automatic updates.
Microsoft Defender Antivirus and other Microsoft antimalware solutions provide a way to manually trigger an update.
In Windows 10, select Check for updates in the Windows Security
Virus & threat protection
screen to check for the latest updates.
Enterprise administrators can also push updates to devices in their network. To clear the current cache and trigger an update, use a batch script that runs the following commands as an administrator:
cd %ProgramFiles%\Windows Defender MpCmdRun.exe -removedefinitions -dynamicsignatures MpCmdRun.exe -SignatureUpdate
Manually download the update
You can manually download the latest update.
Latest security intelligence update
The latest security intelligence update is:
- Version: 1.427.627.0
- Engine Version: 1.1.25030.1
- Platform Version: 4.18.25030.2
- Released: 5/5/2025 1:43:46 AM
- Documentation: Release notes
You need to download different security intelligence files for different products and platforms. Select the version that matches
your Windows operating system
or the environment where you will apply the update.
Note: Starting on Monday October 21, 2019, the Security intelligence update packages will be SHA2 signed.
Please make sure you have the necessary update installed to support SHA2 signing, see
2019 SHA-2 Code Signing Support requirement for Windows and WSUS.
The links point to an executable file named
mpam-fe.exe,
mpam-feX64.exe, or
mpas-fe.exe
(used by older antispyware solutions). Simply launch the file to manually install the latest security intelligence.
End of life for Microsoft Forefront Client Security was on July 14, 2015. Customers are encouraged to
migrate to System Center Endpoint Protection. For more information, visit the
Microsoft support lifecycle website.
Network Inspection System updates
The following products leverage Network Inspection System (NIS) updates:
- Microsoft Security Essentials
- Forefront Endpoint Protection
- System Center 2012 Endpoint Protection
These updates are designed to protect you from network threats, including exploits as they are transmitted. Check the version
of the Antimalware Client component on your security software and download the right version of the NIS updates for your platform.
| 4.1.522.0 and newer | Network Real-time Inspection definitions | 32-bit | 64-bit |
Здравствуйте админ! После того, как я обновил на своём ноутбуке Windows 8.1 до Windows 10, десятка стала активно обновляться и после каждого выключения ноутбука выходит сообщение «Работа с обновлениями. Завершено 100%. Не выключайте компьютер» и ноутбук не выключается довольно долго, мне это надоело и я отключил обновления Windows по вашей статье. Всё бы хорошо, но в качестве антивирусной программы я использую Защитник Windows (Windows Defender), а его антивирусные базы обновляются через Центр обновления Windows, который я отключил, а это значит, что антивирусные базы встроенного в Win 10 антивируса не получают обновлений. Скажите, как можно вручную обновить Защитник Windows? Можно где-то отдельно скачать файлы обновлений для Защитника Windows для операционных систем Windows 7, Windows 8.1 и Windows 10?
Как вручную (автономно) обновить встроенный в Windows 10 антивирус Windows Defender (Защитник Windows)
Привет друзья! Все мы знаем, что встроенный в Windows 10 бесплатный антивирус Windows Defender защищает нашу операционную систему от различных вредоносных программ и получает обновления вирусных сигнатур каждый день через Центр обновлений Windows.
Если вы отключили обновления в Windows 10, то это значит, что встроенный в операционную систему антивирус Windows Defender также не будет обновляться. Поэтому имеет большое значение, держать Центр обновления Windows включенным, чтобы Защитник Windows получал обновления своевременно.
Если вы по каким-либо причинам отключили обновления Windows, то обновить Windows Defender можно вручную (автономно), в сегодняшней статье я покажу вам, как это можно сделать.
В параметрах Windows выбираем «Обновление и безопасность»,
затем «Защитник Windows» и смотрим версию подсистемы, а также определения антивирусной программы и определения антишпионской программы. После ручного обновления версии должны измениться.
Щёлкаем левой мышью на кнопке «Поиск Windows»
и набираем «Защитник Windows», затем жмём на появившееся приложение «Защитник Windows»,
появляется окно антивируса Windows Defender. Видим, что определения вирусов и программ-шпионов очень старые.
Жмём на кнопку «Обновить».
Жмём на кнопку «Обновление определений».
Происходит обновление антивирусных баз Защитника Windows.
Антивирус обновлён.
Версия подсистемы, а так же определения антивирусной программы и определения антишпионской программы изменились.
В процессе обновления у вас может выйти ошибка — «Не удалось обновить определения вирусов и программ шпионов».
В этом случае перейдите по ссылке на официальный сайт Майкрософт
https://www.microsoft.com/en-us/wdsi/definitions
Обновление защиты от вредоносных программ и программ-шпионов программное обеспечение Microsoft.
Ведём шкалу прокрутки вниз до слов…
Обновления для защиты от вредоносных программ и программ-шпионов.
Выбираем версию установленной на нашем компьютере операционной системы и её разрядность. В моём случае, это Windows 10-64 бит.
Мне на компьютер скачивается файл mpam-fe.exe с обновлениями вирусных сигнатур для Защитника Windows размером 120 Мб. Запускаю данный файл от администратора.
Программа не открывает никакого окна. Windows Defender обновляется за несколько минут. Теперь в параметрах Windows выберите «Обновление и безопасность», затем «Защитник Windows» и смотрите версию подсистемы, а также определения антивирусной программы и определения антишпионской программы. После ручного обновления версии должны измениться.
If you want to make sure your Windows system is protected, you may want to download the latest version of Windows Defender. You can do so by visiting Microsoft’s official website. To download the offline version of Windows Defender, you must have a clean computer. If you encounter a problem downloading the offline version, you can try restarting the computer. Microsoft recommends that you do not uninstall the security program after downloading the latest update.
Once you have enabled offline mode, you can go to the Microsoft Update Catalog and search for the latest version of Windows Defender. This update will be available for all Windows 10 versions, including 64-bit and ARM machines. The installer is self-installing, and will take only a few seconds to install. However, if you have a slower computer, you can try running the update manually. This way, you will ensure that your PC is protected against malicious software.
Yes, you can update Windows Defender offline! You can download the offline update from the Microsoft Update Catalog. You can update all Windows 10 units, including ARM and 64-bit ones. The updates are self-installing executable files that take a few seconds to install. But it might take some time if you want your PC to run smoothly. If you are not a fan of the updates, you can also use a different method to update Windows Defender offline.
First, you have to ensure that you are connected to the internet. You need a fast internet connection to download the latest version of Windows Defender. Otherwise, the update will fail to install. You can also manually download the update from the Command Prompt. Be patient and wait for it to finish. Once the download is complete, you can reinstall Windows Defender. Then, you can install the latest version of the security program.
How Do I Download Windows Defender Offline?
To download the latest version of Windows Defender, you can either go online or get a CD or DVD. Alternatively, you can download the latest version on a USB flash drive. Once downloaded, Windows Defender Offline will scan your computer for malware. If it detects any, it will notify you and remove it. To be fully protected, it is a good idea to have the latest definitions. To get these, you can visit Microsoft’s website.
In most modern computers, you can boot from a USB flash drive or CD. The BIOS often sets the CD drive to load first. Make sure to install Windows Defender Offline on the correct flash drive. This will ensure that the latest updates are automatically applied to your computer. Make sure to follow the directions on the download page to ensure that the file you have downloaded is safe and virus-free. Once installed, Windows Defender Offline can protect your computer from malware and other threats.
Can I Manually Install Windows Defender?
If you are wondering: can I manually install Windows Defender offline?, then the answer is yes. To download the offline version, you must first ensure that your computer has a stable internet connection. To do this, visit the official website of Windows Defender. Make sure that you download the 64-bit version, otherwise, you may encounter problems. After downloading the offline version, run the installer and wait for the process to finish. Windows Defender will start the scanning process. During this time, you will not see any windows, which means you should be able to get on with your work.
To update Windows Defender offline, use the Microsoft Update Catalog. This can be done on ARM or 64-bit units. You will need to run the task manager as administrator. Then, type the command splm -update windows defender as an administrator. The update will begin in a few seconds. If an error occurs during the update process, try running the troubleshooter. If it fails, try running the command again.
Does Windows Defender Need to Be Updated?
The answer to the question “Does Windows Defender Need To Be Updated Offline?” may be as simple as running a manual scan. In many cases, this process will take several minutes, but it’s worth it if your computer’s security is in jeopardy. Microsoft has released an official announcement that Windows 11 will be available for compatible PCs later this year. Here’s how to make sure your computer’s antivirus is always updated.
First, ensure that you have Windows Defender installed on your PC. To do this, open the Windows PowerShell command prompt and run it as an administrator. Enter the command “splm -update windows defender” to start the process. The update process may encounter errors and run a troubleshooter. If you are unable to run the offline update, run it manually. Then, click “OK.”
If you have a reliable internet connection, you can set up a scheduled task to automatically check for updates. You can set this task to run at a specific time and day. Once it’s finished, you can re-install Windows Defender and enjoy your new security features. Another option is to download and install the latest version from Microsoft’s website. This will only take a few minutes, and it won’t affect other users’ accounts. You can restore your security program by following the instructions provided.
How Do I Update Windows Defender Using CMD?
If you have been having problems with Windows Defender’s automatic updates, you may be wondering how to download the latest virus signatures. There is an easy way to do this through the Command Prompt. First, open up the Windows Registry Editor. Find and remove the value ‘disableantispyware’. Once you do that, Windows Defender will automatically download and install the latest virus signatures. Once the process is complete, you should see a message stating that “Signature update completed.”
To update the latest version of Windows Defender, you can go to the Microsoft Update Catalog. You can choose the 64-bit or ARM versions of Windows 10. You can also download the latest version of the antivirus program and install it by double-clicking the file. This is a good way to keep your system protected and up to date. Then, open the Windows PowerShell command prompt and type “splm -update windows defender”. Then, wait for the update to complete. If it fails, simply use the “help” command to troubleshoot any errors.
How Do I Update Windows Defender in Windows 11?
If you want to update the antivirus definitions on your Windows system, you can do this with the command prompt. To access the Windows Registry Editor, type ‘cmd’. Locate the value ‘disableantispyware’ and add it to the command prompt. Then, run the command: “sfc /update-windows-defender” and press enter.
Microsoft Defender Offline is an excellent option for removing even the most difficult malware. It will scan the computer before Windows boots up and alert you of any threats that it finds. This feature has the potential to remove ransomware, rootkit, and other forms of malware. It will also let you know if a particular update is outdated or contains a bug that’s preventing your computer from working properly.
If you’re unsure if your Windows Defender is updated, you can manually run the process by running the command “splm -update windows defender” from the Windows PowerShell console. The process will begin immediately and you may encounter errors. If you run this command as an administrator, you can also see troubleshooters for repairing errors. While the process is tedious, it’s not impossible to complete.
How Do I Manually Update Windows 10 Security?
Many users are wondering, “How do I manually update Windows 10 security offline?” There are several reasons you might want to go this route, including network speed and a lack of Internet access. The main benefit of downloading updates offline is their stability and security. When you update your system without a network connection, it doesn’t attempt to download unknown files. Moreover, it won’t break if your network connection goes down. Furthermore, downloading updates offline also improves your PC’s stability by renewing important system drivers. And unlike online updates, offline upgrades take much less time to install.
You can install Windows Defender Offline using a CD, DVD, or USB flash drive. You can then set it up as an automatic update or schedule a task to download the updates for you. In addition, you can manually update Windows Defender Antivirus and Microsoft Defender Antivirus from START by selecting “Manual Update” in the settings menu. However, if you don’t have a backup of your system, you can simply restore Windows Defender and wait for it to install.
Learn More Here:
1.) Windows Help Center
2.) Windows – Wikipedia
3.) Windows Blog
4.) Windows Central
Download Windows Speedup Tool to fix errors and make PC run faster
Windows Defender in Windows 11 and Windows 10 is set to automatically download and install the definition updates using Windows Update, once a day. If for some reason, your Windows Defender will not update automatically, or if you wish to download and save the definition updates in order to maybe update Windows Defender offline, on different installations of Windows 11/10, then this post will be of interest to you.
We have already seen how to download Windows Update manually. Today, we will see how you can manually update Windows Defender in Windows 11 and Windows 10. I will also give links for downloading updates for Windows Defender in the post.
First, check whether you use a 32-bit or 64-bit version of Windows 11/10. Once you know the version of Windows installed on your device, download the installers from the following links:
- Download definition updates for Windows Defender in Windows 11, Windows 10, Windows 8.1/8: 32-bit | 64-bit | ARM.
- Download definition updates for Windows Defender in Windows 7 and Windows Vista: 32-bit | 64-bit.
- Download definition updates for Microsoft Security Essentials: 32-bit | 64-bit.
Once the file has finished downloading, go to your download location and double-click the file mpam–fe.exe. Follow the prompts to install the update.
You can also update Windows Defender definitions using Windows PowerShell.
If you think some malware is preventing the installation of Windows Defender definition updates, you may want to run a scan with Microsoft Safety Scanner or for more stubborn malware, use Windows Defender Offline.
TIP: See how to update Windows offline.
Why can’t I update my Windows Defender?
Suppose you have installed some third-party antivirus tool. In that case, that security program can interfere with Microsoft Defender Antivirus, which could be why you can’t update it. In that case, you should disable any third-party security tool and then try to update the Microsoft Defender Antivirus. You can also run the Windows Update troubleshooter to find and fix issues related to virus definition updates.
How to update Defender using CMD?
To update Windows Defender or Microsoft Defender Antivirus using CMD, first, run Command Prompt as administrator and access the Windows Defender directory. After that, clear the current cache for the update, and then start the update using the following commands:
MpCmdRun.exe -removedefinitions -dynamicsignatures
MpCmdRun.exe -SignatureUpdate
These links are sure to interest you too:
- Update Windows Defender even when Automatic Windows Updates is disabled
- Windows Defender is turned off or not working
- Unable to turn on Windows Defender.
Anand Khanse is the Admin of TheWindowsClub.com, a 10-year Microsoft MVP (2006-16) & a Windows Insider MVP (2016-2022). Please read the entire post & the comments first, create a System Restore Point before making any changes to your system & be careful about any 3rd-party offers while installing freeware.
Windows Defender is a free anti-malware tool from Microsoft which can be used to improve your computer system security. Initially it was released with the name “Microsoft AntiSpyware” for Windows XP and Windows Server 2003 but later it was renamed to Windows Defender. Windows Defender was released for Windows XP and Server 2003 as a free antispyware program. Later it came included with Windows Vista and Windows 7 operating systems.
Microsoft has also included Windows Defender with Windows 8 and Windows 8.1 and now it provides similar protection as Microsoft Security Essentials (MSE).
But there is a small issue with Windows Defender. It downloads and installs its latest virus definition updates using “Windows Update” program. Many times users can’t use Windows Update or don’t want to use Windows Update, in such situations they are unable to update Windows Defender with the latest virus definition files.
There might be another situation. If you don’t have an Internet connection in your computer system, you can’t update Windows Defender as it requires Internet connectivity to download the virus definition files.
To overcome this problem, today in this topic we are going to share official download links for latest virus definition updates for Windows Defender program. These links will allow you to download latest virus definition files which can be stored locally on your computer system or on a USB drive. After that you can manually install those virus definition updates in your computer system or any other computer system and you’ll no longer need an Internet connection or access to Windows Update to update Windows Defender.
If you also want to update Windows Defender offline and install its latest virus definition updates manually, just download them using following links:
- Download Latest Virus Definition Updates for Windows Defender (32-bit)
- Download Latest Virus Definition Updates for Windows Defender (64-bit)
- Download Latest Virus Definition Updates for Windows Defender (Itanium based)
Related: What is IA64 or Itanium-based system
Once you download the file, run the downloaded .EXE file and it’ll automatically install the latest virus definition files and will update Windows Defender offline without using Internet connection or Windows Update.
NOTE: The above mentioned links should be used for Windows XP, Vista and Windows 7 only. If you are using Windows 8 or Windows 8.1, you’ll need to download the virus definition updates using the links given in following tutorial as Windows Defender in Windows 8 and 8.1 uses same virus definitions as Microsoft Security Essentials program:
Download and Install Latest Virus Definition Updates Offline in Microsoft Security Essentials (MSE)
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