Defender Download Windows 10
Ramya Bradbury
Hi, I would like to ask if anyone else has this problem, because after installing EIS, Windows Defender is not disabled even though it is shown as disabled in the settings, even after a reboot.
When Eset analyzes some downloaded file or sometimes when I browse web pages both antivirus use a lot of the processor.
Sometimes I notice performance drops,
Please I would be very grateful for any help you can give me.
It's Windows itself that disables Defender when another 3rd party AV registers in the Security Center. You can open a support ticket for further troubleshooting, however, it's unlikely that we'll be able to help. What you could try is rebuilding the WMI repository as per -the-performance-team/wmi-rebuilding-the-wmi-repository/ba-p/373846.
In Windows Security Center -> Threat & Protection setting, verify that you have not enabled Periodic scanning per below screen shot. If Period scanning is enabled, the Windows Defender engine will load at system startup and remaining running regardless of if a scan is being performed.
Smart App Control's primary protection method is its cloud scanning component. Smart App Control like Microsoft Defender uses file "Mark of the Web" (MotW) status criteria for cloud scanning: . There currently exists a vulnerability in MotW: -attacks-use-windows-security-bypass-zero-day-to-drop-malware/ , yet to be patched by Microsoft, that is currently being actively exploited by hackers. In reality and withstanding any vulnerability status, it is rather trivial to strip MotW ADS from a file download.
Since Windows 11 22H2, the Defender service is always on with all AV products. It's the norm now. But it won't cause any CPU or Disk usage, it stays idle but will update signatures at least once a day/after every system start or restart if fast startup is off.
Thank you all very much for your answers, so it is because of Windows 11 and its new update. In my case along with the performance errors with Nvidia GPUs, I think I will have to go back to Windows 10.
Yeah, it uses some ram which will vary from system to system, but there's no CPU usage or any disk activity. Any usual methods like GPO doesn't work to disable the service. Other methods described by turning off tamper protection, taking ownership, changing permission, etc. should work.
Microsoft describes the Sandbox as "Running Windows Defender Antivirus in a sandbox ensures that in the unlikely event of a compromise, malicious actions are limited to the isolated environment, protecting the rest of the system from harm. The goal for the sandboxed components was to ensure that they encompassed the highest risk functionality like scanning untrusted input, expanding containers, and so on. At the same time, we had to minimize the number of interactions between the two layers to avoid a substantial performance cost."
Sandbox is disabled by default and only available for builds 1709 and newer.
It came enabled by default when Windows 11 came out without third-party AV installed. But a few months later they pushed an update somewhere along the way, either part of a Defender update or Windows update, which disabled the sandbox. It even got disabled in Windows Insider editions. Later it was enabled in Windows 11 insider editions once again. So performance impact or some bugs made MS disable it. I for example found a bug when MD won't delete threats when sandbox is enabled. It only blocked, but didn't delete.
It appears to me that the reason MS is running Defender in Win 11 is to support SmartApp cloud scanning. I wonder if SmartApp was permanently disabled, Defender would revert to Win 10 behavior and not load at system startup time? This would be preferable to permanently disabling MD. I assume with MD permanently disabled, it will not auto startup if there's an issue with an installed third party AV real-time protection.
Microsoft Defender Antivirus (formerly Windows Defender) is an antivirus software component of Microsoft Windows. It was first released as a downloadable free anti-spyware program for Windows XP and was shipped with Windows Vista and Windows 7. It has evolved into a full antivirus program, replacing Microsoft Security Essentials in Windows 8 or later versions.[3]
In March 2019, Microsoft announced Microsoft Defender ATP for Mac for business customers to protect their Mac[4] devices from attacks on a corporate network, and a year later, to expand protection for mobile devices, it announced Microsoft Defender ATP for Android[5] and iOS[6] devices, which incorporates Microsoft SmartScreen, a firewall, and malware scanning. The mobile version of Microsoft Defender also includes a feature to block access to corporate data if it detects a malicious app is installed.
Microsoft Defender Antivirus provides several key features to protect endpoints from computer virus. In Windows 10, Windows Defender settings are controlled in the Windows Defender Security Center. Windows 10 Anniversary Update includes several improvements, including a new popup that announces the results of a scan.[16]
In the Windows Defender options, the user can configure real-time protection options. Windows 10's Anniversary Update introduced Limited Periodic Scanning, which optionally allows Windows Defender to scan a system periodically if another antivirus app is installed.[16] It also introduced Block at First Sight, which uses machine learning to predict whether a file is malicious.[17]
Integration with Internet Explorer and Microsoft Edge enables files to be scanned as they are downloaded to detect malicious software inadvertently downloaded. As of April 2018, Microsoft Defender is also available for Google Chrome via an extension[18] and works in conjunction with Google Safe Browsing, but as of late 2022, this extension is now deprecated.[19]
A feature released in early 2018, Windows Defender Application Guard is a feature exclusive to Microsoft Edge that allows users to sandbox their current browsing session from the system. This prevents a malicious website or malware from affecting the system and the browser. Application Guard is a feature only available on Windows 10 Pro and Enterprise. In May 2019, Microsoft announced Application Guard for Google Chrome and Firefox. The extension, once installed, will open the current tabs web page in Microsoft Edge with Application Guard enabled. In April 2024, Microsoft announced that Microsoft Defender Application Guard will be deprecated for Edge for Business. The Chrome and Firefox extensions will not be migrating to Manifest V3 and will be deprecated after May 2024.[20]
Controlled Folder Access is a feature introduced with Windows 10 Fall Creators Update to protect a user's important files from the growing threat of ransomware. This feature was released about a year later after the Petya family of ransomware first appeared. The feature will notify the user every time a program tries to access these folders and will be blocked unless given access via the user. Windows will warn the user with a User Account Control popup as a final warning if they opt to "Allow" a program to read Controlled Folders.
Windows Defender was initially based on GIANT AntiSpyware, formerly developed by GIANT Company Software, Inc.[21] The company's acquisition was announced by Microsoft on December 16, 2004.[22][23] While the original GIANT AntiSpyware officially supported older Windows versions, support for the Windows 9x line of operating systems was later dropped by Microsoft.
The first beta release of Microsoft AntiSpyware from January 6, 2005, was a repackaged version of GIANT AntiSpyware.[22] There were more builds released in 2005, with the last Beta 1 refresh released on November 21, 2005.
At the 2005 RSA Security conference, Bill Gates, the Chief Software Architect and co-founder of Microsoft, announced that Microsoft AntiSpyware would be made available free-of-charge to users with validly licensed Windows 2000, Windows XP, and Windows Server 2003 operating systems to secure their systems against the increasing malware threat.[24]
On November 4, 2005, it was announced that Microsoft AntiSpyware was renamed to Windows Defender.[25][26] Windows Defender (Beta 2) was released on February 13, 2006. It featured the program's new name and a redesigned user interface. The core engine was rewritten in C++, unlike the original GIANT-developed AntiSpyware, which was written in Visual Basic.[27] This improved the application's performance. Also, since Beta 2, the program works as a Windows service, unlike earlier releases, which enables the application to protect the system even when a user is not logged on. Beta 2 also requires Windows Genuine Advantage (WGA) validation. However, Windows Defender (Beta 2) did not contain some of the tools found in Microsoft AntiSpyware (Beta 1). Microsoft removed the System Inoculation, Secure Shredder and System Explorer tools found in MSAS (Beta 1) as well as the Tracks Eraser tool, which allowed users to easily delete many different types of temporary files related to Internet Explorer 6, including HTTP cookies, web cache, and Windows Media Player playback history.[22] German and Japanese versions of Windows Defender (Beta 2) were later released by Microsoft.[28][29]
On October 23, 2006, Microsoft released the final version of Windows Defender.[30] It supports Windows XP and Windows Server 2003; however, unlike the betas, it doesn't run on Windows 2000.[31] Some of the key differences from the beta version are improved detection, redesigned user interface and delivery of definition updates via Automatic Updates.[32]
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