How to fix KB5021233 fails to install in Windows 10?

Question

Issue: How to fix KB5021233 fails to install in Windows 10?

The newest Windows update, KB5021233, keeps failing to install for me. I have never encountered something before, so I would appreciate some assistance on this matter, please. I'm running Windows version 22H2.

Solved Answer

Windows updates are regular releases of new features, bug fixes, and security updates for the Windows operating system. These updates are essential for the smooth and secure running of your computer, and it is important to keep your system up to date. Windows updates can be installed automatically or manually, depending on your settings.

Just like any other Patch Tuesday, KB5021233 was released for Windows 10 (OS Builds 19042.2364, 19043.2364, 19044.2364, and 19045.2364) versions 21H1, 21H2, and 22H2 on December 13.[1]

Just like KB5021255 for Windows 11, this one is meant to patch several security vulnerabilities[2] present in both versions of the OS. Additionally, the more notable changes include Cortana's removal from the taskbar and the search box being visible if the taskbar is moved to the top.

Security updates are particularly important and should be implemented as soon as possible, although not everybody could do it, as users reported KB5021233 not installing issues. While an error code may be displayed when this happens, some users reported that Windows simply says it will try again later, although this rarely helps.

How to fix KB5021233 fails to install in Windows 10?

Windows update issues are a common occurrence, and most users will experience them at some point during their time using a PC. In many cases, these errors resolve on their own – in this case, the reason being unstable internet connections or issues with Microsoft's servers. Unfortunately, some people can't get the updates to install, and it can become a major issue.

If you can't install KB5021233, we provide several solutions for this issue below – we explain how to fix incorrectly configured related services, bugged[3] update file caches, space issues, system file corruption, and more. Note that many of the troubleshooting steps below can be covered by an automatic PC repair tool ReimageMac Washing Machine X9, which we highly recommend trying.

Fix 1. Troubleshoot

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To repair damaged system, you have to purchase the licensed version of Reimage Reimage.

Troubleshooters are great built-in tools that allow users to find and repair some common issues they are having with their PCs, including Windows updates. Thus, we recommend running a Windows update troubleshooter as the first option.

  • Type Troubleshoot in Windows search and press Enter
  • On the right side of the window, click Additional troubleshooters
  • Scroll down to find Windows update and click it
  • Click Run the troubleshooter – let the process run
  • Once finished, apply the suggested fixes and reboot your system.

Troubleshooter

Fix 2. Make sure you have enough space

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To repair damaged system, you have to purchase the licensed version of Reimage Reimage.

Disk Cleanup is one of the options you could use if KB5021233 fails to install due to a lack of space on the system. Accumulation of temporary or other junk files can be the cause for this – you can remove them as follows:

  • Type Disk Cleanup in Windows search and hit Enter
  • If your Windows is installed on drive C, pick it from the list (should be by default) and press OK
  • Click Clean up system files
  • Select your main disk again and click OK
  • Here, select the largest portions of the data used – these typically include Temporary Internet Files, Windows Update, Temporary Files, Recycle Bin, Delivery Optimization Files, and others.
  • Click OK – the process should be finished shortly.

Disk Cleanup

Fix 3. Check your system files with SFC and DISM

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To repair damaged system, you have to purchase the licensed version of Reimage Reimage.

Corrupted system files or registries are among the most common reasons why Windows updates fail. You can fix them as follows:

  • Type cmd in Windows search
  • Right-click on Command Prompt search result and select Run as administrator
  • UAC (User Account Control) will ask whether it can make changes, click Yes
  • Next, copy and paste the following command and press Enter:
    sfc /scannow
  • Once done, run the following commands as well:
    dism /online /cleanup-image /scanhealth
    dism /online /cleanup-image /checkhealth
    dism /online /cleanup-image /restorehealth
  • Restart your system.

Run SFC and DISM

Fix 4. Install the update manually

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To repair damaged system, you have to purchase the licensed version of Reimage Reimage.

You can try installing the update manually:

  • Open your browser and go to Microsoft Update Catalog
  • Copy and paste the relevant KB number which failed to install (in this case, KB5021233) to the search box and click Search
  • Here, find the correct version of the update for your operating system (to check this, right-click on Start and pick System. Under Device specifications and check the System type)
  • Click Download and follow the on-screen instructions
  • Reboot the system once the process is finished.

Install update manually

Fix 5. Check relevant services

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To repair damaged system, you have to purchase the licensed version of Reimage Reimage.

Windows update process requires certain services (namely, BITS and Windows Update) to run to succeed. If they are already running, you can restart them instead:

  • Type in Services in Windows search and press Enter
  • Scroll down to locate Background Intelligent Transfer Service (BITS)
  • If it is already running, right-click and pick Restart
  • if the service is not running, double-click it, select Automatic under the Startup type from the drop-down menu
  • Click Start, Apply, and OK

Check services

Fix 6. Reset Windows update components

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To repair damaged system, you have to purchase the licensed version of Reimage Reimage.
  • Open Command Prompt (Admin) as explained above
  • Copy and paste the following commands, pressing Enter each time:
    net stop wuauserv
    net stop cryptSvc
    net stop bits
    net stop msiserver
  • Press Win + E to open File Explorer
  • Go to the following locations and delete the contents of these folders:
    C:\Windows\System32\catroot2
    C:\Windows\SoftwareDistribution

Reset Windows update components

  • Open Command Prompt again and paste these command lines:
    net start wuauserv
    net start cryptSvc
    net start bits
    net start msiserver
  • Restart your system.

Fix 7. Try in-place upgrade

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To repair damaged system, you have to purchase the licensed version of Reimage Reimage.

You can always rely on an official Microsoft tool to update your system to the latest version.

  • Visit the official Microsoft website and download Windows 10 installation media
  • Launch the installer and click Yes when the User Account Control window shows up
  • Agree to the terms and click Next
  • Select Upgrade this PC now and click Next
  • Wait till Windows downloads all the necessary files
  • Agree to terms once again and click Next
  • Before installing, make sure that you are happy with your choices (otherwise, you can click Change what to keep option)
  • Finally, click Install to begin the upgrade process.

In-place upgrade

Repair your Errors automatically

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Protect your online privacy with a VPN client

A VPN is crucial when it comes to user privacy. Online trackers such as cookies can not only be used by social media platforms and other websites but also your Internet Service Provider and the government. Even if you apply the most secure settings via your web browser, you can still be tracked via apps that are connected to the internet. Besides, privacy-focused browsers like Tor is are not an optimal choice due to diminished connection speeds. The best solution for your ultimate privacy is Private Internet Access – be anonymous and secure online.

 

Data recovery tools can prevent permanent file loss

Data recovery software is one of the options that could help you recover your files. Once you delete a file, it does not vanish into thin air – it remains on your system as long as no new data is written on top of it. Data Recovery Pro is recovery software that searchers for working copies of deleted files within your hard drive. By using the tool, you can prevent loss of valuable documents, school work, personal pictures, and other crucial files.

About the author
Jake Doe
Jake Doe - Computer technology geek

Jake Doe is the news editor at UGetFix. Since he met Ugnius Kiguolis in 2003, they both launched several projects that spread awareness about cybercrimes, malware, and other computer-related problems.

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