How to fix KB5055612 fails to install in Windows 10?

Windows updates are a critical part of keeping the operating system stable, secure, and compatible with new software or hardware. They are issued on a regular basis by Microsoft and typically include enhancements, bug fixes, and security patches.

Each update has a particular Knowledge Base (KB) number assigned, whereby users and IT specialists can monitor a particular release. But not all of them install updates so conveniently. One of the recently plaguing problems with users is KB5055612, which will not install on certain Windows 10 computers.

KB5055612 is an early April 2025 preview update issued for Windows 10 version 22H2. It is an optional non-security update, adding quality changes beyond usual Patch Tuesday updates. This particular update pertains to performance enhancement and involves a series of fixes, ranging from Windows Search experience improvements to taskbar behavior reliability updates, as well as minute corrections for responsiveness in File Explorer. Since it's a preview, it tends to be available to users who manually look for updates in Windows Update settings.

For some users, however, KB5055612 is not installing as expected. There are several possible explanations as to why this update may not be installing. Corrupted system files, previous updates not being fully completed, not having enough disk space, or issues with the Windows Update components can all create this problem.

In other cases, third-party antivirus software or system configurations that are not correctly set can also interfere with the updating process. Based on the cause, the potential fixes can be to reboot the update components, check for system integrity, or manually download and install the update from the Microsoft Update Catalog.

The manual steps to fix the issue are described below. For those interested in doing it automatically, it is recommended to scan the system with a powerful FortectMac Washing Machine X9 tool to fix the issue successfully.

Fix 1. Run the Windows Update Troubleshooter

This built-in tool is designed to detect and resolve common problems related to Windows Update services. It can automatically reset update components and repair minor issues that prevent updates from installing.

• Type Troubleshoot in Windows search and press Enter.
• Select Additional troubleshooters.
• Find Windows Update in the list.
• Click it and select Run the troubleshooter.
• Restart your computer when the process is finished.

Fix 2. Check services

Before trying a more advanced fix of resetting Windows update components, try checking if relevant services are running.

• Type Services in Windows search and press Enter.
• In the Services window, locate and double-click on the following services one by one (if these are already running, right-click and hit Restart):
  • Windows Update
  • Background Intelligent Transfer Service (BITS)
  • Cryptographic Services
• For each service, ensure that the Startup type is set to Automatic. If it's not, select Automatic from the drop-down menu.
• Check the Service status. If the service is not running, click the Start button to start it.
• Click Apply and then OK for each service.
• Close the Services window and restart your computer.

Fix 3. Synchronize time and date

Incorrect time and date settings could lead to update failures. To address this, make sure your time and date are synced.

• Type in Control Panel in Windows search and press Enter.
• Go to Clock and Region and click on Date and Time.
• Pick the Internet Time tab and select Change Settings.
• Make sure that the Synchronize with an Internet time server box is ticked.
• Click Update now and OK.

Fix 4. Repair system files using SFC and DISM

Corrupted or missing system files may prevent updates from installing. These tools can scan and repair those files.

• Type cmd in Windows search.
• Right-click on Command Prompt and pick Run as administrator.
• User Account Control will ask whether you want to allow changes – click Yes.
• Then, copy and paste the following command, pressing Enter after:
  sfc /scannow
• Wait till the scan is finished. If Windows finds system file integrity violations, it will attempt to fix them. After this, use the set of the following commands, pressing Enter each time:
  DISM /Online /Cleanup-Image /CheckHealth
  DISM /Online /Cleanup-Image /ScanHealth
  DISM /Online /Cleanup-Image /RestoreHealth
  
• (Note: if you get an error executing this last command, add /Source:C:\RepairSource\Windows /LimitAccess to it and try again).
• Close down the Command Prompt and restart your system.

Fix 5. Make sure there's enough disk space

Insufficient disk space can block update downloads and installations. Ensuring you have free space allows the update to proceed.

• Type Disk Cleanup in Windows search and hit Enter.
• If your Windows is installed on drive C, pick it from the list (it 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.

Fix 6. Reset Windows Update components

This method helps if the update services or components are stuck or corrupted beyond what the troubleshooter can fix.

• Open Command Prompt as administrator.
• Stop the BITS, Windows Update, and Cryptographic services by typing the following commands, and pressing Enter after each:
  • net stop bits
  • net stop wuauserv
  • net stop appidsvc
  • net stop cryptsvc
• To rename the SoftwareDistribution and Catroot2 folders (where Windows stores update files), type the following commands:
  • ren %systemroot%\SoftwareDistribution SoftwareDistribution.old
  • ren %systemroot%\system32\catroot2 catroot2.old
  • regsvr32.exe /s atl.dll
  • regsvr32.exe /s urlmon.dll
  • regsvr32.exe /s mshtml.dll
  • netsh winsock reset
  • netsh winsock reset proxy
• Restart the services stopped earlier by typing the following commands:
  • net start bits
  • net start wuauserv
  • net start appidsvc
  • net start cryptsvc
• Close the Command Prompt and restart your computer, then try updating Windows again.

Fix 7. Try Clean Boot

While antivirus software is a likely cause of preventing Windows updates from installing, it could be any other application installed on your PC (usually, one that can modify network connections). So, you can disable security software first; if that does not help, try updating in Clean Boot:

• Press Win R, type msconfig, and hit Enter.
• Go to the Services tab and tick the Hide all Microsoft services checkbox.
• Select Disable all.
• Go to the Startup tab and click Open Task Manager.
• Here, right-click on each of the non-Windows entries and select Disable.
• Close down the Task Manager.
• Go to the Boot tab and tick the Safe boot option.
• Click OK.
• Restart your computer to initiate the Clean Boot.
• Try running Windows Update again.

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