Win Update KB890830 Windows Malicious Software Removal Tool 5.141 - May 12



 Microsoft Support:

Windows Malicious Software Removal Tool (MSRT) 5.141 helps remove malicious software from computers running any of the following operating systems:
  • Windows 11
  • Windows Server 2022
  • Windows 10
  • Windows Server 2019
  • Windows Server 2016
  • Windows 8.1
  • Windows Server 2012 R2
  • Windows Server 2012
  • Windows 7
Microsoft generally releases MSRT monthly as part of Windows Update or as the standalone tool. Use this tool to find and remove specific prevalent threats and reverse the changes they have made (see covered threats). For comprehensive malware detection and removal, consider using Microsoft Safety Scanner.

This article contains information about how the tool differs from an antivirus or antimalware product, how you can download and run the tool, what happens when the tool finds malware, and tool release information. It also includes information for the administrators and advanced users, including information about supported command-line switches.

Notes:
  • In compliance with the Microsoft Support Lifecycle policy, MSRT is no longer supported on Windows Vista and older platforms. For more information, go to Microsoft Support Lifecycle.
  • If you are having problems in regards to an MSRT update within Windows Update, see Troubleshooting problems updating Windows 10.
  • Starting in May 2025, the Windows Malicious Software Removal Tool is no longer supported on Windows Server 2008 and Windows Server 2008 R2.


 Read more:

Remove specific prevalent malware with Windows Malicious Software Removal Tool (KB890830)

Manual download:

How to Use Malicious Software Removal Tool in Windows

 
Click to expand...
Here it is...

1778630384113.webp
 

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Hi everyone,
I am having an issue with the latest Windows Malicious Software Removal Tool (MSRT) version 5.141 (KB890830) via Windows Update.
The installation process is extremely slow and seems to be taking forever to complete. It gets stuck at a certain percentage for ages.
The previous version of the tool worked completely fine and installed without any issues, so this performance drop seems specific to version 5.141.
Is anyone else experiencing this massive delay with the 5.141 update? Is it safe to force restart the Windows Update service, or should I just leave it running overnight to let it finish?
Thanks for any advice!
 

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Windows 11
OS
Windows 11
Computer type
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forumuser said:
I am having an issue with the latest Windows Malicious Software Removal Tool (MSRT) version 5.141 (KB890830) via Windows Update.
Click to expand...

Mine downloaded/installed rather quickly yesterday.

You could try it from the MS update catalog, third one down on the list.


1778744351685.webp
 

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Scott said:
Mine downloaded/installed rather quickly yesterday.

You could try it from the MS update catalog, third one down on the list.


View attachment 171456
Click to expand...
Thanks for the reply. I have a question: if I download it from the page you provided, can I install it "over" the current setup while Windows Update is actively trying to install it? I already have other update files downloaded and just waiting to be installed. Please help.

 

My Computer My Computer

At a glance

Windows 11
OS
Windows 11
Computer type
PC/Desktop
Had the same problem with the Windows Malicious Software Removal Tool (MSRT) version 5.141 (KB890830) update.
It stalled around 10%, then slowly proceeded at about 2-3 % per hour after that. This prevented the rest of last Tuesdays updates from installing.
Ther was no sign of any activity on Task Manager.
I let it run overnight, and the next morning found the system had rebooted around 07:00, and all updates were installed.
DISM and SFC showed no errors, and everything showed 'Installed' in Windows Update History.
My machine is running normally.

Hope this helps,

Dave.
 

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Windows 11 Pro 25H2 build 26200.8875AMD Ryzen 7 7800X3D 8-Core ProcessorCorsair Vengeance 32GB (2 X 16 GB, DDR 5)Sapphire Nitro AMD Radeon RX 9070 XT, 16GB
OS
Windows 11 Pro 25H2 build 26200.8875
Computer type
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Manufacturer/Model
Homemade in Feb 2025.
CPU
AMD Ryzen 7 7800X3D 8-Core Processor
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MSI MAG B650 Tomahawk WiFi
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Corsair RM850x
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Very old ATX
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be quite! PURE ROCK SLIM 2
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Logitech K120 wired USB
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Logitech M570 wirless trackerball
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300 Mbps down and 70 Mbps up from a TP-Link Archer NX210 5G sim card router
Browser
Firefox 152.0.6
Antivirus
Just Windows Defender
dgordon42 said:
Had the same problem with the Windows Malicious Software Removal Tool (MSRT) version 5.141 (KB890830) update.
It stalled around 10%, then slowly proceeded at about 2-3 % per hour after that. This prevented the rest of last Tuesdays updates from installing.
Ther was no sign of any activity on Task Manager.
I let it run overnight, and the next morning found the system had rebooted around 07:00, and all updates were installed.
DISM and SFC showed no errors, and everything showed 'Installed' in Windows Update History.
My machine is running normally.

Hope this helps,

Dave.
Click to expand...
Thank you for the answer and advice. I want to share a strange situation. Yesterday, when I turned on my PC and opened Windows Update, the Windows Malicious Software Removal Tool version 5.141 (KB890830) update started installing from the exact percentage where it had previously left off. Surprisingly, it finished installing after 30 minutes. The other pending updates were also installed. After the restarts (there were 3), everything was fine with no errors. However, I noticed something strange in the update history: only 3 updates from May 2026 were visible (successfully completed). The one this post is about (Windows Malicious Software Removal Tool version 5.141 (KB890830)) was missing. Have you also experienced this case?
 

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Windows 11
OS
Windows 11
Computer type
PC/Desktop
For me it's in Windows Update > Update History > Other Updates, near the bottom of the Update History page.
All the Windows Malicious Software Removal Tool updates are in this section.

It also appears in Reliability Monitor twice for some reason:


Dave.
1778857511947.webp
 

My Computer My Computer

At a glance

Windows 11 Pro 25H2 build 26200.8875AMD Ryzen 7 7800X3D 8-Core ProcessorCorsair Vengeance 32GB (2 X 16 GB, DDR 5)Sapphire Nitro AMD Radeon RX 9070 XT, 16GB
OS
Windows 11 Pro 25H2 build 26200.8875
Computer type
PC/Desktop
Manufacturer/Model
Homemade in Feb 2025.
CPU
AMD Ryzen 7 7800X3D 8-Core Processor
Motherboard
MSI MAG B650 Tomahawk WiFi
Memory
Corsair Vengeance 32GB (2 X 16 GB, DDR 5)
Graphics Card(s)
Sapphire Nitro AMD Radeon RX 9070 XT, 16GB
Sound Card
Realtek ALC 4080 on Motherboard
Monitor(s) Displays
LG E2442 on HDMI
Screen Resolution
1920 X 1080, 60Hz
Hard Drives
Silicon Power XS70 2TB M2 2280, Western Digital 1TB HDD, Seagate 500 GB HDD, Crucial 250GB SSD.
PSU
Corsair RM850x
Case
Very old ATX
Cooling
be quite! PURE ROCK SLIM 2
Keyboard
Logitech K120 wired USB
Mouse
Logitech M570 wirless trackerball
Internet Speed
300 Mbps down and 70 Mbps up from a TP-Link Archer NX210 5G sim card router
Browser
Firefox 152.0.6
Antivirus
Just Windows Defender
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