Microsoft Defender test results


Into_Oblivion1

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Dear all

1.
From this article:

“Microsoft Defender didn’t do too well during full scanning as it only blocked the first EICAR sample and missed the others. It also allowed all of the live samples. This caught my attention, considering it blocked all threats during the real-time testing phase.”

According to the test results in the article, Microsoft Defender scanner is quite bad?

2.
But according to Malware Protection Test March 2024 Microsoft Defender excels / performs really good

How come the test results in the article by Comparitech are worse than the test results in Malware Protection Test March 2024?

3.
If a malicious file download itself onto my laptop
Will the real-time scanner then scan it immediately?
Or first when the malicious file is ran / activated?

4.
Is Windows Defender and Microsoft Defender the same and/or equally good?

Thank you
 
Windows Build/Version
Windows 11

My Computer My Computer

At a glance

Windows 11
OS
Windows 11
Computer type
Laptop
Is Windows Defender and Microsoft Defender the same and/or equally good?


Microsoft Defender is the new name for Windows Defender.
It's the same AV though.
 

My Computers My Computers

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    Win 11 Home ♦♦♦26200.8655 ♦♦♦♦♦♦♦25H2AMD Ryzen 7 3700XG.Skill (F4-3200C14D-16GTZKW)EVGA RTX 2070 (08G-P4-2171-KR)
    OS
    Win 11 Home ♦♦♦26200.8655 ♦♦♦♦♦♦♦25H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    Built by Ghot® [May 2020]
    CPU
    AMD Ryzen 7 3700X
    Motherboard
    Asus Pro WS X570-ACE (BIOS 5302)
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    Dell U3011 30"
    Screen Resolution
    2560 x 1600
    Hard Drives
    2x Samsung 860 EVO 500GB,
    WD 4TB Black FZBX - SATA III,
    WD 8TB Black FZBX - SATA III,
    DRW-24B1ST CD/DVD Burner
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    PC Power & Cooling 750W Quad EPS12V
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    Cooler Master ATCS 840 Tower
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    CM Hyper 212 EVO (push/pull)
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    Ducky DK9008 Shine II Blue LED
    Mouse
    Logitech Optical M-100
    Internet Speed
    300/300
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    Firefox (latest)
    Antivirus
    Bitdefender Total Security
    Other Info
    Speakers: Klipsch Pro Media 2.1
  • At a glance

    Windows XP Pro 32bit w/SP3AMD Athlon 64 X2 5000+ (OC'd @ 3.2Ghz)TWIN2X2048-6400C4DHX (2 x 1GB, DDR2 800)EVGA 256-P2-N758-TR GeForce 8600GT SSC
    Operating System
    Windows XP Pro 32bit w/SP3
    Computer type
    PC/Desktop
    Manufacturer/Model
    Built by Ghot® (not in use)
    CPU
    AMD Athlon 64 X2 5000+ (OC'd @ 3.2Ghz)
    Motherboard
    ASUS M2N32-SLI Deluxe Wireless Edition
    Memory
    TWIN2X2048-6400C4DHX (2 x 1GB, DDR2 800)
    Graphics card(s)
    EVGA 256-P2-N758-TR GeForce 8600GT SSC
    Sound Card
    Onboard
    Monitor(s) Displays
    ViewSonic G90FB Black 19" Professional (CRT)
    Screen Resolution
    up to 2048 x 1536
    Hard Drives
    WD 36GB 10,000rpm Raptor SATA
    Seagate 80GB 7200rpm SATA
    Lite-On LTR-52246S CD/RW
    Lite-On LH-18A1P CD/DVD Burner
    PSU
    PC Power & Cooling Silencer 750 Quad EPS12V
    Case
    Generic Beige case, 80mm fans
    Cooling
    ZALMAN 9500A 92mm CPU Cooler
    Keyboard
    Logitech Classic Keybooard 200
    Mouse
    Logitech Optical M-BT96a
    Internet Speed
    300/300
    Browser
    Firefox 3.x ??
    Antivirus
    Symantec (Norton)
    Other Info
    Still assembled, still runs. Haven't turned it on for 15 years?
According to the test results in the article, Microsoft Defender scanner is quite bad?
The article is not quite so downbeat on Defender. Its conclusion does say:

"Microsoft Defender is an excellent performer that doesn’t slow down your PC, it picks up a good amount of malware infections, and it doesn’t cost anything to set up, but the positives end there".
 

My Computers My Computers

  • At a glance

    Windows 11 HomeAMD Athlon Silver 3050U8GBRadeon Graphics
    OS
    Windows 11 Home
    Computer type
    Laptop
    Manufacturer/Model
    Acer Aspire 3 A315-23-R9VY
    CPU
    AMD Athlon Silver 3050U
    Memory
    8GB
    Graphics Card(s)
    Radeon Graphics
    Monitor(s) Displays
    laptop screen
    Screen Resolution
    1366x768 native resolution, up to 2560x1440 with Radeon Virtual Super Resolution
    Hard Drives
    1TB Samsung EVO 870 SSD (from April 2026: 250GB EVO 850)
    Internet Speed
    150 Mbps
    Browser
    Edge, Firefox
    Antivirus
    Defender
    Other Info
    fully 'Windows 11 ready' laptop. Windows 10 C: partition migrated from my old unsupported 'main machine' then upgraded to 11. A test migration ran Insider builds for 2 months. When 11 was released on 5th October 2021 it was re-imaged back to 10 and was offered the upgrade in Windows Update on 20th October. Windows Update offered the 22H2 Feature Update on 20th September 2022. It got the 23H2 Feature Update on 4th November 2023 through Windows Update, 24H2 on 3rd October 2024 through Windows Update by setting the Target Release Version for 24H2, and 25H2 on 30th September 2025 through Windows Update by setting the Target Release Version for 25H2.

    UPDATE - 11 April 2026: due to mechanical deterioration this PC has been retired from active duty. The OS with all software and files has been migrated to my System Seven in 'Other systems' to carry on as my general purpose 'main machine'.
  • At a glance

    Windows 11 ProIntel® Core™ i5-520M8GB(integrated graphics) Intel HD Graphics
    Operating System
    Windows 11 Pro
    Computer type
    Laptop
    Manufacturer/Model
    Dell Latitude E4310
    CPU
    Intel® Core™ i5-520M
    Motherboard
    0T6M8G
    Memory
    8GB
    Graphics card(s)
    (integrated graphics) Intel HD Graphics
    Screen Resolution
    1366x768
    Hard Drives
    500GB Crucial MX500 SSD
    Browser
    Firefox, Edge
    Antivirus
    Defender
    Other Info
    unsupported machine: Legacy bios, MBR, TPM 1.2, upgraded from W10 to W11 using W10/W11 hybrid install media workaround.

    In-place upgrade to 22H2 using ISO and a workaround.
    Feature Update to 23H2 by manually installing the Enablement Package.
    In-place upgrade to 24H2 using hybrid 23H2/24H2 install media.
    Upgraded to 25H2 by Enablement Package.

    Also running Insider Dev, and Canary builds and Windows 10 as native boot .vhdx.
  • My SYSTEM THREE is a Dell Latitude 5410, i7-10610U, 32GB RAM, 512GB NVMe ssd, supported device running Windows 11 Pro.

    My SYSTEM FOUR is a 2-in-1 convertible Lenovo Yoga 11e 20DA, Celeron N2930, 8GB RAM, 256GB ssd. Unsupported device: currently running Win10 Pro, plus Win11 Pro RTM and Insider Dev, Beta, and RP 24H2 as native boot vhdx.

    My SYSTEM FIVE is a Dell Latitude 3190 2-in-1, Pentium Silver N5030, 8GB RAM, 1TB NVMe ssd, supported device running Windows 11 Pro, plus Insider Beta, Dev, and Canary builds (and a few others) as a native boot .vhdx.

    My SYSTEM SIX is a Dell Latitude 5550, Core Ultra 7 165H, 64GB RAM, 1TB NVMe SSD, supported device, Windows 11 Pro 24H2, Hyper-V host machine. Updated to 25H2 on 30th September 2025.

    My SYSTEM SEVEN is a Lenovo Thinkpad T580, Intel Core i7-8650U, 16GB RAM, 512GB NVMe SSD + 2nd 512GB NVMe SSD, a supported device for Windows 11. This is my current general purpose 'main machine'. The installed Windows 11 Home from my System One has been migrated to this machine.
How come the test results in the article by Comparitech are worse than the test results in Malware Protection Test March 2024?

Comparitech doesn't make any money from Microsoft Defender:

How we make money​

When we list a product, service or app in a review or an article, we’ll usually link to it. Some of these links allow us to earn a referral fee if you, the reader, goes on to sign up for the service, which in turn helps us fund the site.

https://www.comparitech.com/about-us/
 

My Computer My Computer

At a glance

Windows 11
OS
Windows 11
Computer type
Laptop
One reason Defender does well in the most "reputable" tests is because it relies on the cloud so heavily. Its local, on machine scan results are less than stellar compared to its cloud performance. I don't consider Comparitech a reputable tester, and even the ones that are have to be taken with a huge grain of salt. Tests are only snapshots in time and in no way gauge overall performance.
 

My Computer My Computer

At a glance

Windows 11 Pro 25H2 26200.7840Intel Core i3-8145U16GB
OS
Windows 11 Pro 25H2 26200.7840
Computer type
Laptop
Manufacturer/Model
Lenovo IdeaPad L340
CPU
Intel Core i3-8145U
Memory
16GB
Hard Drives
500 GB M2 1 TB HDD
Internet Speed
400 MB
Browser
Chrome | Edge
Antivirus
Microsoft Defender | Block unknown executables | Various ASR rules enabled | Smart App Control
Recently we’ve received similar questions from our viewers:

“Just read your best reviewed antivirus programs and I wonder how you would rate the Windows Defender that comes with Windows 10?” – Tim

“I have been told that with Windows Defender, we don’t need any other program. …What’s your advice?” – Anita


It’s hard not to feel like your bases are covered with a name like Windows Defender, but is it good enough to keep you and your devices safe from hackers?

While some users were surprised to see that with the frequency of real-time scans that the viruses still managed to infiltrate their systems, others were even more shocked to find once they do find the viruses, there’s nothing Windows Defender could do about it.

Many users are now wondering if it is a good enough standalone option to protect their computer.

It is most definitely essential to have some antivirus security protection especially if you’re running Windows. Because Windows Defender automatically comes installed on Windows 10 and 11, it’s really easy to simply turn it on and use it.

However, while it may be easy to just ‘click and go’, it is important to know if it is strong enough to be your primary antivirus software or see if stronger antivirus protection is better for you.


What is Windows Defender?

Before we even get to the nitty-gritty of whether or not Windows Defender is even comparable to one of the third-party antivirus software programs we recommend in Best Antivirus Protection, it’s important to understand what it actually does.

Found under Windows 10 or later security settings, Windows Defender does help identify various security threats and protect certain aspects of its user’s experience. It comes pre-installed with Windows 10 & 11, which means you need to do nothing else to use it. If no other antivirus software is detected or disabled, Windows Defender automatically turns on.


Windows Defender

Pros

  • Free
  • Already integrated into your Windows Operating System
  • Will scan offline for vulnerabilities and will reboot to eliminate persistent malware
  • Comes with a firewall and ‘Find My Device’ feature, which helps to locate, lock and if necessary, erase your computer (Windows 10/11)
  • Protects most Microsoft products on the computer it is running on
  • Protects against real-time threats, which means its focal aim is to stop viruses, spyware, worms ransomware, or malware from being installed on your device in the first place
Cons
  • Doesn’t protect against phishing or spam, where a lot of viruses and malicious threats get introduced to your device
  • Only works on the singular Windows 10/11 computer it is installed on so if you’re a multiple-device household, you might be left vulnerable
  • Some users complain that it is not updated fast enough with current threats allowing many to sneak into your PC
  • Only works across other Microsoft products, which means if you use alternate browsers such as Firefox or Chrome, the benefits of Windows Defender will not work
  • Additionally, that means the parental controls that are part of Windows Defender only work with Edge, the Microsoft browser
  • Though you can put Microsoft Family Safety apps on iOS and Android devices, it requires a paid subscription to Microsoft Office 365
  • Only protects Microsoft products on your computer so any third-party apps or programs are still vulnerable to security and privacy breaches

Will AntiVirus security software offer better protection?

The short answer is yes. The explanation shares an understanding of what most third-party antivirus software programs provide when Windows Defender falls short.


Strong Antivirus security software

Pros

  • Most have packages that give you the option to protect single or multiple computers as well as other devices, such as your phone or tablet
  • Unlike Windows Defender which focuses just on real-time threats, most other antivirus programs also can scan archives files and non-Microsoft-based programs
  • More rigorous at detecting, blocking, isolating, and helping you eliminate viruses, malware, and other threats on your computer
  • Most also have broader features such as dark web monitoring, anti-phishing, anti-spam guards, VPN, or password managers
Cons
  • Costs additional money and many require renewal fees if it is a subscription program
  • Requires installation on whatever devices you want to be protected on
  • Can be confusing and overwhelming to sort through various features and price points for different subscription programs. (Get clarity and recommendations by referring to the article Best AntiVirus Protection.)
  • Requires a bit more attention than a more passive program like Windows Defender because some antivirus software programs allow you to review threats quarantined before deletion or other actions

It’s definitely better to run Windows Defender rather than nothing. It’s not a true replacement for good antivirus security protection. Windows Defender fails at detecting many threats. And worse, it doesn’t help you once trouble gets through to your PC.


How do I turn Windows Defender off?

If you do want to protect yourself further with third-party antivirus software like our top pick, TotalAV, it would be best to uninstall Windows Defender altogether.

This way there aren’t any conflicting actions or duplicate efforts both of which can eat up space and performance speed.

Step-by-step guidelines to turn off Windows Defender

1) Open the Start menu

2) Search for Windows Security and open.

3) Click Virus & Threat Protection

4) Click on Manage settings

5) Turn off Real-time protection by switching toggle to “off”


Overall, Windows Defender is an improved feature that provides some basic benefits to those without third-party antivirus software.

If you’re serious about the safety and security of all your devices – and you should be – then a third-party antivirus software such as TotalAV will protect you better.

Have you used Windows Defender? Or do you feel safer using another third-party antivirus solution? Let us know in the comments below what’s worked best for you.


Copyright 2024 CyberGuy.com. All rights reserved. CyberGuy.com articles and content may contain affiliate links that earn a commission when purchases are made.

Windows Defender vs Antivirus software: free protection falls short - CyberGuy
 

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  • At a glance

    Windows 11 Pro 25H2 (26200.8655)Intel® Core™ i9-13900KS 3.20GHz128GB DDR5-5200 Kingston Fury Beast RGBZotac Trinity NVIDIA® GeForce® RTX 4090 24GB ...
    OS
    Windows 11 Pro 25H2 (26200.8655)
    Computer type
    PC/Desktop
    Manufacturer/Model
    CLX Intel Battlebox Ultimate (RA)
    CPU
    Intel® Core™ i9-13900KS 3.20GHz
    Motherboard
    ASUS ROG Maximus Z790 Hero WIFI - ATX
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    128GB DDR5-5200 Kingston Fury Beast RGB
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    Sound Card
    Realtek USB Audio
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    Dell G3223Q 32" 4K Ultra HD
    Screen Resolution
    3840x2160 @144hz
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    2TB x 2 Samsung 990 Pro 2280 NVMe M.2 SSD's
    2TB x 1 Samsung 980 Pro 2280 NVMe M.2 SSD
    4 TB x 1 My Passport Ultra External USB
    PSU
    1200W Corsair HX Ser HX1200 80+ Platinum
    Case
    Lian Li / Der Bauer 011DXL ROG
    Cooling
    Phanteks Glacier One 360 RGB AIO LC
    Keyboard
    Logitech K330 Wireless
    Mouse
    Logitech M310 Wireless
    Internet Speed
    1GB Fiber : 945/57
    Browser
    Brave
    Antivirus
    Defender - HitmanPro.Alert
    Other Info
    Macrium Reflect X
  • At a glance

    iPad Air
    Operating System
    iPad Air
    Computer type
    Tablet
    Manufacturer/Model
    Apple
If you’re serious about the safety and security of all your devices – and you should be – then a third-party antivirus software such as TotalAV will protect you better.

Windows Defender vs Antivirus software: free protection falls short - CyberGuy

CyberGuy also doesn't make any money from Microsoft Defender:

We also make money from affiliate links to retailers such as Amazon from products that we cover editorially.

https://cyberguy.com/cyberguy-terms-use-agreement-ethics-privacy-policies/

TOTALAV: Recommend Our Leading Security Products and Get Paid For It
 

My Computer My Computer

At a glance

Windows 11
OS
Windows 11
Computer type
Laptop

My Computers My Computers

  • At a glance

    Windows 11 Pro 25H2 (26200.8655)Intel® Core™ i9-13900KS 3.20GHz128GB DDR5-5200 Kingston Fury Beast RGBZotac Trinity NVIDIA® GeForce® RTX 4090 24GB ...
    OS
    Windows 11 Pro 25H2 (26200.8655)
    Computer type
    PC/Desktop
    Manufacturer/Model
    CLX Intel Battlebox Ultimate (RA)
    CPU
    Intel® Core™ i9-13900KS 3.20GHz
    Motherboard
    ASUS ROG Maximus Z790 Hero WIFI - ATX
    Memory
    128GB DDR5-5200 Kingston Fury Beast RGB
    Graphics Card(s)
    Zotac Trinity NVIDIA® GeForce® RTX 4090 24GB GDDR6X
    Sound Card
    Realtek USB Audio
    Monitor(s) Displays
    Dell G3223Q 32" 4K Ultra HD
    Screen Resolution
    3840x2160 @144hz
    Hard Drives
    2TB x 2 Samsung 990 Pro 2280 NVMe M.2 SSD's
    2TB x 1 Samsung 980 Pro 2280 NVMe M.2 SSD
    4 TB x 1 My Passport Ultra External USB
    PSU
    1200W Corsair HX Ser HX1200 80+ Platinum
    Case
    Lian Li / Der Bauer 011DXL ROG
    Cooling
    Phanteks Glacier One 360 RGB AIO LC
    Keyboard
    Logitech K330 Wireless
    Mouse
    Logitech M310 Wireless
    Internet Speed
    1GB Fiber : 945/57
    Browser
    Brave
    Antivirus
    Defender - HitmanPro.Alert
    Other Info
    Macrium Reflect X
  • At a glance

    iPad Air
    Operating System
    iPad Air
    Computer type
    Tablet
    Manufacturer/Model
    Apple
If you’re serious about the safety and security of all your devices – and you should be – then a third-party antivirus software such as TotalAV will protect you better.
This statement alone is indicative of the reliability of this review. Total AV is a big joke. Definitely clickbait. Word.
 
Last edited:

My Computer My Computer

At a glance

Windows 11 Pro 25H2 26200.7840Intel Core i3-8145U16GB
OS
Windows 11 Pro 25H2 26200.7840
Computer type
Laptop
Manufacturer/Model
Lenovo IdeaPad L340
CPU
Intel Core i3-8145U
Memory
16GB
Hard Drives
500 GB M2 1 TB HDD
Internet Speed
400 MB
Browser
Chrome | Edge
Antivirus
Microsoft Defender | Block unknown executables | Various ASR rules enabled | Smart App Control
Care to address any of the technical aspects of his review?
OK. At least three out of seven "Cons" for Microsoft Defender are NOT true:

I.E, these:

Cons
  • Doesn’t protect against phishing or spam, where a lot of viruses and malicious threats get introduced to your device
  • Only works across other Microsoft products, which means if you use alternate browsers such as Firefox or Chrome, the benefits of Windows Defender will not work
  • Only protects Microsoft products on your computer so any third-party apps or programs are still vulnerable to security and privacy breaches
 

My Computer My Computer

At a glance

Windows 11
OS
Windows 11
Computer type
Laptop
Since talk is cheap...

 

My Computer My Computer

At a glance

WinDOS 25H2Intel & AMDSO-DIMM SK Hynix 15.8 GB Dual-Channel DDR4-26...nVidia RTX 2060 6GB Mobile GPU (TU106M)
OS
WinDOS 25H2
Computer type
Laptop
CPU
Intel & AMD
Memory
SO-DIMM SK Hynix 15.8 GB Dual-Channel DDR4-2666 (2 x 8 GB) 1329MHz (19-19-19-43)
Graphics Card(s)
nVidia RTX 2060 6GB Mobile GPU (TU106M)
Sound Card
Onbord Realtek ALC1220
Screen Resolution
1920 x 1080
Hard Drives
1x Samsung PM981 NVMe PCIe M.2 512GB / 1x Seagate Expansion ST1000LM035 1TB
Its local, on machine scan results are less than stellar compared to its cloud performance.
Local machine scan, is that when the machine is offline and can't compare to the online / cloud registry / database?
 

My Computer My Computer

At a glance

Windows 11
OS
Windows 11
Computer type
Laptop
3.
If a malicious file download itself onto my laptop
Will the real-time scanner then scan it immediately?
Or first when the malicious file is ran / activated?
 

My Computer My Computer

At a glance

Windows 11
OS
Windows 11
Computer type
Laptop

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