How to fix KB5035845 fails to install in Windows 10?

Issue: Hi. I can't install KB5035845. It usually goes as far as 80-90% during the installation and then Windows says the update fails. I tried several times but the result is always the same.

Solved Answer

Windows 10 users aiming to enhance their system's functionality and security through the latest update, KB5035845, released on March 12, 2024, might encounter installation setbacks. This update, which corresponds to OS Builds 19044.4170 and 19045.4170, is designed to introduce critical improvements and fix existing vulnerabilities. Despite its significance, the installation process for some may not proceed as smoothly as anticipated.

Users attempting to install the update may encounter issues such as conflicts with third-party security software, insufficient storage space, or corrupted system files. These problems can prevent the successful application of the update, thereby delaying access to crucial security patches and system improvements.

To fix the issue where KB5035845 fails to install, it's essential for users to consider a few strategic actions. Making sure there is enough disk space by cleaning up unnecessary files can alleviate one of the primary barriers to update installation. Temporarily disabling any third-party antivirus or firewall programs may also help, as these can interfere with the update process.

For issues that seem more complex, running the Windows Update Troubleshooter can provide automated fixes to common update problems. In instances where automatic updates fail, manually downloading and installing the update from the Microsoft Update Catalog can serve as a viable alternative.

Additionally, employing system tools like the System File Checker and Deployment Image Servicing and Management scans can repair system integrity, potentially smoothing the path for the update.

If you face other issues on Windows besides KB5035845 not installing, you could also try running a powerful PC repair tool FortectMac Washing Machine X9, which could find underlying Windows issues and fix them automatically.

How to fix KB5035845 fails to install in Windows 10?

Fix 1. Temporarily disable antivirus software

Antivirus programs can sometimes interfere with the update process. Temporarily disabling your antivirus might resolve installation issues.

  • Open your antivirus application.
  • Look for an option to disable protection.
  • Try updating Windows again. Alternatively, you can uninstall the antivirus.

Fix 2. Run the Windows Update Troubleshooter

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This built-in tool can automatically find and fix problems with Windows Update.

  • Type in Troubleshoot in Windows search and hit Enter.
  • Go to Additional Troubleshooters.
  • Select Windows update and click Run the troubleshooter.
  • Wait till the scan is finished, and then apply the suggested fixes.
  • Restart your system.

Troubleshooter

Fix 3. Check for sufficient disk space

Ensuring adequate disk space is crucial for update installation. Lack of space can prevent the update from downloading and installing.

  • Initiate the Windows search bar and enter Disk Cleanup, then press Enter to launch the utility.
  • Pick the main drive (C: by default) and select the option for Clean up system files.
  • Choose the drive once more and press OK.
  • From the array of files that can be cleaned, choose those taking up the most space, for example, Temporary Internet Files, Windows Update, and Temporary Files, among others.
  • Hit OK to begin the cleanup process.

Disk Cleanup

Fix 4. Check relevant services

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  • Press Win + R, type services.msc, and press Enter.
  • Locate Background Intelligent Transfer Service (BITS).
  • If it is already running, right-click and select 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.
  • Repeat the process with the Windows Update, Cryptographic, and Windows Installer services.

Services

Fix 5. Install the update manually

The manual method might work for you to bypass Windows update errors.

  • Go to the official Microsoft Update Catalog website.
  • Type the KB5035845 into the search bar, and press Enter or click Search.
  • You will find many different versions on the update – you need to find the one that matches your PC specs and Windows version (as a home user, ignore Windows server versions).
  • Right-click on Start and pick System.
  • Under Device specifications, check the System type section: it should either be 64-bit or 32-bit.
  • Scroll down to Windows specifications and check the Version section.
  • Return to the Microsoft Update catalog, download the correct version, and install it.
  • Restart your system.

Install update manually

Fix 6. Reset Windows update components

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  • Open Command Prompt as administrator, as explained previously.
  • In the new window, use the following commands, pressing Enter after each:
    net stop bits
    net stop wuauserv
    net stop appidsvc
    net stop cryptsvc
    Del “%ALLUSERSPROFILE%\Application Data\Microsoft\Network\Downloader\*.*”
    rmdir %systemroot%\SoftwareDistribution /S /Q
    rmdir %systemroot%\system32\catroot2 /S /Q
    regsvr32.exe /s atl.dll
    regsvr32.exe /s urlmon.dll
    regsvr32.exe /s mshtml.dll
    netsh winsock reset
    netsh winsock reset proxy
    net start bits
    net start wuauserv
    net start appidsvc
    net start cryptsvc
  • Restart your system.

Reset Windows update components

Fix 7. Perform in-place upgrade

  • Visit the official Microsoft website and download Windows 10 installation media.
  • Double-click the installer, select Yes when UAC shows up, and agree to the terms.
  • Launch the installer.
  • Agree to the terms and click Next.
  • Select Upgrade this PC now and click Next.
  • Wait for Windows to download files.
  • Agree to the terms once again and click Next.
  • Before installing, ensure you are happy with your choices (otherwise, you can click the Change what to keep option).
  • Click Install to begin the upgrade process.

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About the author
Ugnius Kiguolis
Ugnius Kiguolis - The problem solver

Ugnius Kiguolis is the founder and editor-in-chief of UGetFix. He is a professional security specialist and malware analyst who has been working in IT industry for over 20 years.

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