Solved What is Web Threat Defense Service


ChrisPbass

ChrisPbass

Well-known member
Member
Local time
10:58 PM
Posts
163
OS
w11 home
There is also an instance with _user service_21cd3ab

there are 3 pcs on this network and it's running on all of them.
we use Wireguard to vpn
malwarbytes...
W11 pro or home

I can't find anything on this. One of the PCs is an older HP laptop and stopping the service seemed to speed it up, or it was something else that done to the PC. I was working on another problem and came upon it services.

1766173489279.webp
 

My Computers

System One System Two

  • OS
    w11 home
    Computer type
    Laptop
    Manufacturer/Model
    ThinkPad T14s Gen 4
    CPU
    i7 Raptor Lake
    Memory
    16gb DDR5 8 slots/2 each???
    Graphics Card(s)
    Intel XE
    Monitor(s) Displays
    Acer / Viewsonic 24"
    Screen Resolution
    1920*1200
    Hard Drives
    M2 Aprilcom 1tb
    Keyboard
    wireless Logi
    Mouse
    Logi k270
    Internet Speed
    1gb
    Browser
    Brave or Thorium ocasionally
    Antivirus
    Malwarebytes
    Other Info
    W11 Home
  • Operating System
    W11 Pro
    Computer type
    PC/Desktop
    Manufacturer/Model
    custom
    CPU
    AMD ryzen 7 5500x
    Motherboard
    ASus B550F Gaming
    Memory
    16gb
    Hard Drives
    m2 1tb
learn.microsoft.com

Per-user services

Learn about per-user services, how to change the template service startup type, and manage per-user services through group policy and security templates.
learn.microsoft.com

This is did not shine a ton of light on the subject

OK, apparently it's legitimate. I just don't know why i need it, and it did seem to help the other laptop.
 

My Computers

System One System Two

  • OS
    w11 home
    Computer type
    Laptop
    Manufacturer/Model
    ThinkPad T14s Gen 4
    CPU
    i7 Raptor Lake
    Memory
    16gb DDR5 8 slots/2 each???
    Graphics Card(s)
    Intel XE
    Monitor(s) Displays
    Acer / Viewsonic 24"
    Screen Resolution
    1920*1200
    Hard Drives
    M2 Aprilcom 1tb
    Keyboard
    wireless Logi
    Mouse
    Logi k270
    Internet Speed
    1gb
    Browser
    Brave or Thorium ocasionally
    Antivirus
    Malwarebytes
    Other Info
    W11 Home
  • Operating System
    W11 Pro
    Computer type
    PC/Desktop
    Manufacturer/Model
    custom
    CPU
    AMD ryzen 7 5500x
    Motherboard
    ASus B550F Gaming
    Memory
    16gb
    Hard Drives
    m2 1tb
Perhaps related to "Trend Micro"
 

My Computers

System One System Two

  • OS
    25H2 10.0.26200 26200.2584
    Computer type
    PC/Desktop
    Manufacturer/Model
    Beelink SER8 Mini
    CPU
    AMD Ryzen 7 8845HS
    Motherboard
    AZW SER8 AMD Promontory/Bixby FCH
    Memory
    DDR5-5600 / PC5-44800 DDR5 SDRAM SO-DIMM32G
    Graphics Card(s)
    AMD Radeon 780M
    Sound Card
    AMD Zen - Audio Processor - HD Audio Controller
    Monitor(s) Displays
    1 LG HDR 32"
    Screen Resolution
    2560x1440
    Hard Drives
    1TB Crucial NVMe
    2TB Crucial NVME
    WD 1TB SSD SATA to USB3
    1 Seagate BUP Slim 2TB SATA to USB3
    1 Seagate BUP Slim 4TB SATA to USB3
    Samsung SSD 1TB SATA to USB3
    Samsung 500G SATA to USB3
    500G Crucial SSD to USB3
    PSU
    Beelink Proprietary
    Case
    Beelink Proprietary
    Cooling
    Beelink Proprietary
    Keyboard
    Logitech Backlit USB
    Mouse
    Logitech M510
    Internet Speed
    T-Mobile 5G 500 T-Mobile Home Internet -Asus ZenWifi AX Mesh
    Browser
    Edge, Firefox, Chrome
    Antivirus
    Microsoft Security 1.451.235.0 version created 6-2-2026
    Other Info
    Macrium X Build 10.0.8843
    Minitool Pro Ultimate 13.6
    REVO Pro 5.5.0.0 Portable
    JAM Treesize 9.7.2.2203 Perpetual Outdated.
    JAM Ultrasearch Pro 4.9.1.1204 Perpetual Outdated.
    Malwarebytes Pro 5.5.7.255 Update 1.0.110434 Component 157.0.5633
    Screenpresso Pro 2.2.12.3 beta (.Net 4.8) 2026-5-026
    Hamrick Vue Scan Pro 9.8.51.13
    Visio 2021 Pro 2021 MSO (Version 2605 Build 16.0.20026.20076) 64-bit
    Droid Transfer-Android 26.2.26.0
    Thunderbird 151.0.1
    em Client 10.4.5326
    Affinity Suite 3.2.1
    Microsoft 365 MSO (Version 2605 Build 16.0.20026.20076) 64-bit
    Adobe Creative cloud Version 6911 Apps 6.9.0.618 CCLibrary 4.16.2 (Photo subscription)
    HXD Hex Editor Version 2.5.0.0
    DAW Software Reaper-Izotope Plugins
    TGRMN Software ViceVersa Pro Build 6015 and VVEngine 3 Build 3000
    ISOBuster Pro 5.8.0.0
    Microsoft Visio Pro 2021 Version 2605 Build 16.0.20026.20076
    Many Other free and paid applications
    WYSIWYG Web Builder 21.07
    Filezilla 3.70.5
    Putty .83 and Putty Gen .83
    System Informer 4.0.26144.416 Stable
    O&O Regedit Version12 Build 2172
    WINRAR 7.22
    Lockhunter 3.4.3.146. x64
    Advanced IP Scanner 2.5.1
    Epson Eco Tank Printers and Epson Scanners.
    Bluestacks for Ring Cameras
    PEAK DCA Transistor Graphical USB Interface for Viewing Transistor Operational Curves. Win 10 Version and has functioneded on Win11 perfectly. Version 1.1.1963.
    Games - Card Games -Microsoft FSX "Pro Gold Flight Sim with add ons. Still works perfectly.
    Still run a few older onese successfully on win11 as well with no graphic issue.
  • Operating System
    Win11 Pro OEM 25H2 OS Build 26200.7019
    Computer type
    PC/Desktop
    Manufacturer/Model
    Beelink
    CPU
    AMD Ryzen 7 8845HS
    Motherboard
    AMD
    Memory
    DDR5 32G
    Graphics card(s)
    Beelink SER7
    Sound Card
    Beelink SER7
    Monitor(s) Displays
    Dell
    Screen Resolution
    Native
    Hard Drives
    1TB Crucial NVMe SSD 2G SATA
    PSU
    Beelink Proprietary
    Case
    Beelink Proprietary
    Cooling
    Beelink Proprietary
    Keyboard
    gaming keyboard
    Mouse
    MS
    Internet Speed
    T-Mobile 5G
    Antivirus
    Defender Malwarebytes
    Other Info
    Microsoft 365 Family Office
    Macrium X Subscription1 Version 10
    Mini-Tool Ultimate 13.0 Lifetime
    Malwarebytes Premium w/VPN 5
    Revo Pro Portable Pro 5
    Roboform 9.7.7.
    Others. (All legit)
I'm seeing this on my Daily Driver. Also right next to it is also "Web Threat Defense User Service_b6250"

windowsforum.com

CVE-2025-21343: New Windows Security Vulnerability Explained

Attention Windows users! Just when you thought the beginning of the year was going to be smooth sailing, a new security vulnerability has emerged, and it’s not one to overlook. Microsoft has disclosed an information disclosure vulnerability identified as CVE-2025-21343 that specifically impacts...
windowsforum.com windowsforum.com
 

My Computer

System One

  • OS
    Win 7/10/11
    Computer type
    PC/Desktop
    Other Info
    I'm a computer enthusiast so have quite a few systems that I run. More like an advanced hobby.
From:
www.cve.news

CVE-2025-21343 - Windows Web Threat Defense User Service Information Disclosure Vulnerability – Explained, Exploited & Mitigated

In February 2025, Microsoft patched a significant flaw: CVE-2025-21343. This vulnerability affects the Windows Web Threat Defense User Service, shipping with recent versions of Windows 10 and Windows 11. However, users and IT teams remain confused about its real-world impact, the risk, and steps...
www.cve.news


What is Windows Web Threat Defense User Service?​

The Windows Web Threat Defense service helps Windows defend users from web-based malware and phishing by checking URLs and files. It runs in the background with certain privileges, providing network protection and integrating with Microsoft Defender.
Click to expand...

 

My Computers

System One System Two

  • OS
    Windows 11 Pro 25H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    Homebuilt
    CPU
    Intel Core i9 13900K
    Motherboard
    Asus ProArt Z790 Creator WiFi - Bios 3107
    Memory
    Corsair Dominator Platinum 64gb 5600MT/s DDR5 Dual Channel
    Graphics Card(s)
    Sapphire NITRO+ AMD Radeon RX 7900 XTX Vapor-X 24GB
    Sound Card
    External DAC: Cambridge Audio DACMagic200M - Headphone Amp: Topping L50
    Monitor(s) Displays
    Panasonic MX950 Mini LED 55" TV 120hz
    Screen Resolution
    3840 x 2160 120hz
    Hard Drives
    Samsung 980 Pro 2TB (OS)
    Samsung 980 Pro 1TB (Files)
    Lexar NZ790 4TB
    LaCie d2 Professional 6TB external - USB 3.1
    Seagate Expansion 16TB external - USB 3.2
    Seagate One Touch 18TB external HD - USB 3.0
    PSU
    Corsair RM1200x Shift
    Case
    Corsair RGB Smart Case 5000x (white)
    Cooling
    Corsair iCue H150i Elite Capellix XT
    Keyboard
    Incase Ergonomic USB (Microsoft clone)
    Mouse
    Logitech MX Master 3S
    Internet Speed
    Fibre 900/500 Mbps
    Browser
    Microsoft Edge Chromium
    Antivirus
    Bitdefender Total Security
    Other Info
    AMD Radeon Software & Drivers 26.1.1
    Hasleo Backup Suite
    Dashlane password manager
    Kensington Verimark fingerprint reader
    Logitech Brio 4K webcam
    Orico 10-port powered USB 3.0 hub
  • Operating System
    Windows 11 Pro 25H2
    Computer type
    Laptop
    Manufacturer/Model
    Asus Vivobook X1605VA
    CPU
    Intel® Core™ i9-13900H
    Motherboard
    Asus X1605VA bios 309
    Memory
    32GB DDR4-3200 Dual channel
    Graphics card(s)
    *Intel Iris Xᵉ Graphics G7
    Sound Card
    Realtek | Intel SST Bluetooth & USB
    Monitor(s) Displays
    16.0-inch, WUXGA 16:10 aspect ratio, IPS-level Panel
    Screen Resolution
    1920 x 1200 60hz
    Hard Drives
    512GB M.2 NVMe™ PCIe® 3.0 SSD
    Mouse
    Logitech MX Ergo Trackball
    Antivirus
    Bitdefender Total Security
    Other Info
    720p Webcam
    WiFi & USB to ethernet
Marcus Vinicus said:
From:
www.cve.news

CVE-2025-21343 - Windows Web Threat Defense User Service Information Disclosure Vulnerability – Explained, Exploited & Mitigated

In February 2025, Microsoft patched a significant flaw: CVE-2025-21343. This vulnerability affects the Windows Web Threat Defense User Service, shipping with recent versions of Windows 10 and Windows 11. However, users and IT teams remain confused about its real-world impact, the risk, and steps...
www.cve.news




Click to expand...

OK, I saw that. I got in the head a lot as a kid. Do I need this ? I see ways to disable it.
 

My Computers

System One System Two

  • OS
    w11 home
    Computer type
    Laptop
    Manufacturer/Model
    ThinkPad T14s Gen 4
    CPU
    i7 Raptor Lake
    Memory
    16gb DDR5 8 slots/2 each???
    Graphics Card(s)
    Intel XE
    Monitor(s) Displays
    Acer / Viewsonic 24"
    Screen Resolution
    1920*1200
    Hard Drives
    M2 Aprilcom 1tb
    Keyboard
    wireless Logi
    Mouse
    Logi k270
    Internet Speed
    1gb
    Browser
    Brave or Thorium ocasionally
    Antivirus
    Malwarebytes
    Other Info
    W11 Home
  • Operating System
    W11 Pro
    Computer type
    PC/Desktop
    Manufacturer/Model
    custom
    CPU
    AMD ryzen 7 5500x
    Motherboard
    ASus B550F Gaming
    Memory
    16gb
    Hard Drives
    m2 1tb
ChrisPbass said:
OK, I saw that. I got in the head a lot as a kid. Do I need this ? I see ways to disable it.
Click to expand...
On my PC it is hardly using any system resources. It is helping protect the system so why get rid of it? Not much point afaik.

webthreatservice.webp
 

My Computers

System One System Two

  • OS
    Windows 11 Pro 25H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    Homebuilt
    CPU
    Intel Core i9 13900K
    Motherboard
    Asus ProArt Z790 Creator WiFi - Bios 3107
    Memory
    Corsair Dominator Platinum 64gb 5600MT/s DDR5 Dual Channel
    Graphics Card(s)
    Sapphire NITRO+ AMD Radeon RX 7900 XTX Vapor-X 24GB
    Sound Card
    External DAC: Cambridge Audio DACMagic200M - Headphone Amp: Topping L50
    Monitor(s) Displays
    Panasonic MX950 Mini LED 55" TV 120hz
    Screen Resolution
    3840 x 2160 120hz
    Hard Drives
    Samsung 980 Pro 2TB (OS)
    Samsung 980 Pro 1TB (Files)
    Lexar NZ790 4TB
    LaCie d2 Professional 6TB external - USB 3.1
    Seagate Expansion 16TB external - USB 3.2
    Seagate One Touch 18TB external HD - USB 3.0
    PSU
    Corsair RM1200x Shift
    Case
    Corsair RGB Smart Case 5000x (white)
    Cooling
    Corsair iCue H150i Elite Capellix XT
    Keyboard
    Incase Ergonomic USB (Microsoft clone)
    Mouse
    Logitech MX Master 3S
    Internet Speed
    Fibre 900/500 Mbps
    Browser
    Microsoft Edge Chromium
    Antivirus
    Bitdefender Total Security
    Other Info
    AMD Radeon Software & Drivers 26.1.1
    Hasleo Backup Suite
    Dashlane password manager
    Kensington Verimark fingerprint reader
    Logitech Brio 4K webcam
    Orico 10-port powered USB 3.0 hub
  • Operating System
    Windows 11 Pro 25H2
    Computer type
    Laptop
    Manufacturer/Model
    Asus Vivobook X1605VA
    CPU
    Intel® Core™ i9-13900H
    Motherboard
    Asus X1605VA bios 309
    Memory
    32GB DDR4-3200 Dual channel
    Graphics card(s)
    *Intel Iris Xᵉ Graphics G7
    Sound Card
    Realtek | Intel SST Bluetooth & USB
    Monitor(s) Displays
    16.0-inch, WUXGA 16:10 aspect ratio, IPS-level Panel
    Screen Resolution
    1920 x 1200 60hz
    Hard Drives
    512GB M.2 NVMe™ PCIe® 3.0 SSD
    Mouse
    Logitech MX Ergo Trackball
    Antivirus
    Bitdefender Total Security
    Other Info
    720p Webcam
    WiFi & USB to ethernet
You must log in or register to reply here.

Similar threads

Solved What is CMigrationService Service?
Replies
5
Views
22K
cheaterslick
C
  • Article Article
More reliable web defense with Microsoft Edge and Microsoft Defender Smartscreen
Replies
0
Views
2K
Brink
Brink

Latest Support Threads

Latest Tutorials

Back
Top Bottom