Fix Windows Update Error KB890830 (Windows Malicious Software Removal Tool)


Do you want to protect your Windows computer from malicious software like viruses and spyware? I understand the threats that come with outdated security solutions–I’ve had those worries too. But, luckily there is a great solution available with Microsoft’s KB890830 update.

In this blog post, we’ll discuss the details of the update, how to install it properly and troubleshoot any errors you may encounter while doing so.

This post will provide all the information necessary for users to maintain their Windows systems using effective malware prevention and detection tools like MRT or Microsoft Security Essential.

What is KB890830 and its Purpose?

KB890830 is a security patch developed by Microsoft to help users protect against malicious software and prevent virus infections, improve system reliability, and enhance the overall security of their devices.

Definition and Purpose of KB890830

KB890830 is a security update for the Windows Malicious Software Removal Tool. Its purpose is to detect and remove malware from computers running on Windows operating system, such as viruses, Trojans, worms, etc., thereby protecting them against malicious software and virus attacks.

This tool can be used both as an update through Windows Update or downloaded and manually installed as a standalone security program for any of the versions of Windows – including 11, 10, Server 2016/2019 – making it accessible across different machine architectures.

In addition to protection against malicious software, this tool also helps in closing down potential system vulnerabilities that could lead to hacked machines or data breaches.

The latest version (v5.100) provides full compatibility with theseWindows versions ensuring better defense measures against cyber threats by keeping machines up-to-date with regular updates regularly available via Microsoft server updates downloads .

History and Version Updates of KB890830

KB890830 from Microsoft is an update for the Windows Malicious Software Removal Tool, which works to protect users against a range of threats, such as viruses and Spyware programs.

It can be installed through Windows Update or as a standalone tool using an executable file, and is compatible with various versions of Windows – including 11, 10 LTSB, 1903+, 8.1, 2019 Server, 2016 Server+, 2012 Server+ etc. The latest version v5.100 (KB890830) includes expanded coverage for threats to cover newer variants as well as support multiple languages such as Spanish and Portuguese across all their supported systems.

This update also improves the accuracy of scans by optimizing detection algorithms used in protection from malicious software around the world. Furthermore it allows administrators to change scan start time windows in order run scheduled scans more accurately within organization environments for fulfilling compliance requirements on system security..

How to Get, Download, Install, and Update KB890830 – Windows Malicious Software Removal Tool

Follow these steps to download, install and update KB890830 for optimal computer security.

Step-by-Step Instructions for Downloading, Installing, and Updating KB890830

  1. To download, install, and update KB890830 on your Windows 11 or 10 computer, you’ll need to go to the Update & Security section of Settings.
  2. Next, click “Check for updates” under the Windows Update tab.
  3. If there are any available updates related to KB890830 they will show up here – select them and follow the prompts provided by Windows in order to start downloading and installing these updates automatically.
  4. Once complete you should see a confirmation that your system is now updated with protection against malware via KB890830 .
  5. It is important to note that compatibility may vary depending on what version of Windows you have installed so please make sure that your system meets all requirements before attempting an update regarding this tool.
  6. Lastly if errors (such as mrt.exe) occur during this procedure then users can attempt uninstalling the program from their systems using Update & Security settings , though it is always advised that one perform a back-up copy prior doing so in case something goes wrong.

Compatibility of KB890830 with Different Windows Versions

KB890830 is a Windows update that provides important security updates and malicious removal tool software to help protect your computer. It’s compatible with various versions of Windows, including Windows 11, Windows 10 LTSB (Long-Term Servicing Branch), Windows 10 version 1903 and later, Window 8.1, andServer 2019, Server 2016, Server 2012 R2 editions.

Depending on the version of windows you are using either automatic or manual download options have to be used for installing this patch correctly. Automatic download works through windows update while manually it can be downloaded from Microsoft’s official website.

Additionally special care has to be taken when trying to install the patch on specialized versions like the ones mentioned above as they might include specific requirements or limitations depending on which edition is being used.

How to Fix Common Issues and Errors with KB890830 (Windows Update)

Many users encounter installation and download issues when dealing with the Microsoft Windows Malicious Software Removal Tool (KB890830). It is essential to understand how to install KB890830 successfully, as well as what to do when faced with common issues such as mrt.exe errors.

  1. Uninstall Update – To remove a delivery optimization update that may be causing interference, uninstall it from your computer through Update & Security in the Start menu.
  2. Download Again – If you’re having difficulty downloading or starting installation, try closing all browsers and downloads before attempting again.
  3. Set up Administrator Account– For those without an administrator account set up on their computer will need one in order to download KB890830 properly
  4. Re-Boot Your Computer – In certain cases after updating files, customers have reported needing simply re-booting their computer in order for the changes take effect correctly.

Advanced Troubleshooting

1. Resetting Windows Update Service

Stop Windows Update Service

  1. Hit the Start button and start typing “services.msc”. It should pop up in your search results.
  2. Give it a click to open it. A new window containing all Windows services on your system will show up.
  3. From the list, find “Windows Update”.
  4. Give it a right-click and then select Stop.

Clean Windows Update Cache Folder

  1. Hold down your Windows key and hit “R” at the same time.
  2. A small new window will appear.
  3. In this window, type %windir%\SoftwareDistribution\DataStore and hit OK.
  4. Windows Explorer will open the right location for you.
  5. Go ahead and delete all the contents of this folder. (Pro tip: Use Ctrl + A to select all files and folders)

Start Windows Update Service

  1. Head back to the windows Services.
  2. Find Windows Update again.
  3. Right-click on it and choose Start.

2. Run the System File Checker (SFC) utility,

  1. Click Start and type “cmd” into the search bar.
  2. CMD should show up with a black icon. Right-click it and select Run as administrator.
  3. If prompted for the admin password, type it in and click OK.
  4. You’ll see a completely black window, you can type commands directly into this.
  5. Type sfc/scannow and hit Enter.
  6. This process may take a while. Feel free to minimize this window and carry on with your work. Check back in a bit to see if it’s done.
  7. Once the SFC process is done, go ahead and restart your computer. After the restart, check for Updates again.

Also read: Fix Install Error 0x80070103 In Windows 11

3. Clean the Windows Update download path.

  1. Hold your Windows key and hit “R”.
  2. In the new window that pops up, type regedit and hit Enter.
  3. You’ll see a navigation pane on the left side of the new window. Use it to navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate
  4. Once you’re there, look for WUServer and WIStatusServer in the right-hand pane.
  5. If they’re not listed, we can’t clean the download path. If they’re there, go ahead and delete both.
  6. Restart your computer.

The Importance of Regularly Updating KB890830

Regularly updating KB890830 is essential to protect your computer from malicious software threats and ensure your system remains secure. Read on to find out more about the importance of regularly updating this vital Microsoft Security tool!

Protecting Against Malicious Software

Keeping our computers safe from malicious software is a must these days. To ensure this security, we need to regularly update KB890830 – the Windows Malicious Software Removal Tool.

This tool helps identify and remove malware from machines running Windows 11/10 operating systems by scanning for known threats. Microsoft releases updates monthly, making sure all known viruses and worms are quickly identified and removed, providing us with much needed online protection.

With regular updates, users can be confident in knowing that their system is fully protected against malicious activities while also being able to take advantage of its other features like complete system maintenance such as fixing corrupt registry keys and cleaning junk files over time.

Related: Windows 10 KB5025221 April 2023 Security Update

Benefits of Regular Updates

Keeping KB890830 regularly updated is important for protecting against malicious software threats. The Windows Malicious Software Removal Tool, also known as the update for KB890830, provides essential security updates to address vulnerabilities and improve overall system security on computers operating with different versions of Windows such as Server 11, 10 or below.

With regular updates of KB890830 via the Windows Update tool or through downloading and installation of the most recent version (v5.100) separately it is possible to protect computers from malicious software attacks by addressing any existing vulnerabilities that could lead to potential data leakage through exploitation.

Updating this tool helps in enhancing computer safety features and preventing misuse of exposed weaknesses while strengthening user data protection capabilities substantially reducing threat levels associated with cyber-attacks and other nefarious activities targeting sensitive information stored within a device.

Alternative Tools for Malware Removal

As an alternative to utilizing KB890830, users should be aware of other software options available for malware removal; including antivirus software or specialized programs designed specifically for removing malicious programs from a computer.

Other Software Options for Malware Removal

Malwarebytes is a powerful tool for malware detection and removal, as well as ransomware protection. It can scan all aspects of a computer to detect infections, with real-time protection options and scheduled scans available for optimal security. However, experienced users may find it difficult to remove the detected malware manually.

Pros and Cons of Different Tools for Malware Removal

There are several different tools available for malware removal. Each one comes with its own pros and cons. Let’s take a look at a comparison of some of these tools:


Tool Pros Cons
Windows Malicious Software Removal Tool (KB890830) It’s designed specifically for Windows, ensuring good compatibility with various versions. It doesn’t interfere with any antivirus software and helps remove prevalent malicious software. Some users may encounter issues such as the mrt.exe error or conflicts with third-party antivirus software. Also, it needs to be updated and run manually, which may be inconvenient for some users.
Avast Antivirus It offers real-time protection and operates quietly in the background. It also has a user-friendly interface and a strong reputation for detecting and removing malware. It can slow down your system slightly, especially during the full system scans. Some users also find the pop-up ads promoting the premium version to be intrusive.
Malwarebytes It’s effective at detecting and removing malware and offers a clean, user-friendly interface. It also has a free version that provides basic protection. The free version only removes malware after an attack and lacks real-time protection. To get full protection, you need to upgrade to the premium version.
Norton Antivirus Norton offers strong malware protection, a wealth of features, and has minimal impact on system performance. Norton is pricier compared to other antivirus solutions. Its advanced features might be overwhelming for less tech-savvy users.


When choosing a malware removal tool, it’s important to consider the pros and cons of each option carefully. The best tool for you will depend on your specific needs, your level of technical expertise, and the potential impact on your system’s performance. Choose a tool that offers robust protection but is also user-friendly and compatible with your system.

Also See: How to Fix Windows Update Error 0xc1900223?


Given the ever-evolving nature of malicious software, regularly updating KB890830 is essential for maintaining Windows computer security. Using the Windows Malicious Software Removal Tool helps to remove malware commonly found on PCs and protect users from potential risks associated with such threats.

Compatibility and installation stability are also important factors worth considering when evaluating the value of KB890830 contributions to overall system health. With regular updates, allowing Microsoft’s security measures to work in tandem with other antivirus products, users can ensure better protection against a wide range of emerging online threats today.

I am a computer engineer holding a bachelor's degree in Computer Science, complemented by a Master's in Business Administration from University of Strathclyde, Scotland. I currently work as a Senior IT Consultant in Melbourne, Australia. With over 15 years of...