How to Fix KB5027303 Update Not Installing on Windows 11 – Top10SM

default image

Have you been trying unsuccessfully to install the latest KB5027303 update on your Windows 11 machine? As a fellow tech geek, I totally get how frustrating that can be. This update has some really helpful improvements that we want to start using!

The good news is, I‘ve got some proven solutions to finally get the KB5027303 update installed, even if Windows Update is failing. Stick with me through this nerdy but friendly guide, and we‘ll walk through how to troubleshoot and fix the KB5027303 no install issue together.

Let‘s Start With What This Update Actually Does

Before jumping into the technical fixes, it‘s worth quickly going over what‘s included in this KB5027303 update for context on why it‘s worth the effort to install it. As Windows 11 power users, we want to keep our systems up to date to benefit from the latest optimizations and security enhancements Microsoft develops.

Here are some of the notable improvements included in the KB5027303 update:

  • Enhanced Notification Badging – You‘ll see notification badges on the Microsoft account icon in the Windows taskbar, providing quick access to notifications from Microsoft apps and services. As someone who likes to stay on top of messages, this is a nice quality of life improvement.

  • Simplified File Sharing – We can now share local files directly from File Explorer by emailing them to Outlook contacts. No more needing to first upload files elsewhere before sending!

  • Updated Voice Access Help – The built-in voice access feature, which allows controlling Windows through voice commands, has an improved in-app help page with expanded descriptions, examples, and instructions. Handy for accessibility.

  • Microsoft Defender Improvements – This includes a variety of bug fixes and performance enhancements for Microsoft Defender for Endpoint, improving Windows security protections.

  • Streamlined Authentication – Provides single sign-on capabilities across Microsoft online services, reducing the number of times you need to enter credentials. Nice usability perk.

So in summary, definitely a useful all-around update that‘s worth getting installed! Now let‘s dig into some solutions to fix it if the update isn‘t downloading or installing properly from Windows Update.

Start With the Windows Update Troubleshooter

As an initial step, I recommend first running the built-in Windows Update Troubleshooter. This automated diagnostics tool can sniff out and resolve many common Windows Update errors and inconsistencies.

Here are the quick steps to use it:

  1. Open the Start Menu and go to Settings > System > Troubleshoot
  2. Select "Other Troubleshooters" from the menu
  3. Choose "Windows Update" from the list
  4. Click the "Run" button and follow the on-screen directions
  5. Restart your PC when prompted

The troubleshooter digs into things like:

  • Identifying corrupt Windows Update files and performing repairs
  • Checking for missing or outdated .NET framework installations
  • Reviewing Windows Update configuration and services for issues
  • Diagnosing problems with background intelligent transfer service (BITS)
  • Reviewing the update cache and temporary Windows Update files

It‘s quick and easy to run, and automates checking for many potential errors that could be blocking the KB5027303 update. Definitely worth trying first!

Reset Windows Update Components

If the troubleshooter comes back clean, another option is resetting and re-registering the core Windows Update components. This can clear out any corrupt files or inconsistencies that may have developed.

Here are the steps:

  1. Create a text file named WuFix.bat and paste the following commands:
net stop bits 

net stop wuauserv  

net stop appidsvc

net stop cryptsvc  

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 

regsvr32.exe /u /s shell32.dll 

regsvr32.exe /u /s initpki.dll

regsvr32.exe /u /s dssenh.dll

regsvr32.exe /u /s rsaenh.dll

regsvr32.exe /s dssenh.dll 

regsvr32.exe /s rsaenh.dll  

regsvr32.exe /s initpki.dll

regsvr32.exe /s shell32.dll

netsh winsock reset

netsh winhttp reset proxy

netsh int ip reset 

netsh advfirewall reset

ipconfig /flushdns

dism /online /cleanup-image /restorehealth 

DISM /Online /Cleanup-Image /ScanHealth

DISM /Online /Cleanup-Image /CheckHealth

sfc /scannow

net start bits 

net start wuauserv  

net start appidsvc 

net start cryptsvc
  1. Save the file to your desktop and right-click > Run as administrator
  2. Let the batch file run and restart your PC when it completes

This will entirely rebuild the Windows Update service, re-register all the related DLLs, clear DNS and Winsock caches, and scan for any corrupt files. After restarting, try checking for the KB5027303 update again.

Check for Driver or Software Conflicts

In some cases, an incompatible driver or software program on your system may be causing a conflict that blocks the KB5027303 update from installing correctly.

It‘s worth reviewing your installed drivers and applications to see if any known problematic software is present:

  • Older VPN clients or virtualization programs are known to sometimes clash with Windows Updates. Try uninstalling or updating them.

  • Overly restrictive security or antivirus software can block updates from downloading or installing properly. Add exceptions for Windows Update.

  • Faulty or outdated driver updates can also disrupt the update process. Check for driver updates and re-install them.

  • Beta software, debugging tools or development kits often conflict. Uninstall them.

So take a look through your apps and drivers for anything that stands out as being old, overly restrictive, or known to cause conflicts. Removing or updating them may resolve the issue.

Perform Windows Update Isolation

Another technique is to perform Windows Update isolation. This blocks other software from interfering while the update is in progress.

Follow these steps to isolate Windows Update:

  1. Open Command Prompt as administrator

  2. Run the following commands:

net stop wuauserv

net stop bits

net stop dosvc

ren %systemroot%\SoftwareDistribution SoftwareDistribution.bak 

ren %systemroot%\system32\catroot2 catroot2.bak

net start wuauserv

net start bits 
  1. Check for Windows Updates again

This stops the Windows Update service and BITS, renames the update folders, and restarts the services. Any installed software is now blocked from accessing Windows Update temporarily while it downloads and installs updates. This prevent conflicts.

After the update completes, you can rename the folders back to restore normal behavior. The isolation allows the update to succeed.

Use the Windows Update Assistant

If you still can‘t get KB5027303 to install through Windows Update itself, another option is using the Windows Update Assistant tool. This can directly download and install updates through an alternative process.

To use it:

  1. Download the Windows Update Assistant from

  2. Run the executable file once downloaded

  3. Accept the license terms and click Accept and Install

  4. Reboot your PC when prompted

The Update Assistant will directly install the KB5027303 update without going through Windows Update. This avoids any issues that may be occurring there.

Clean Install the Update from Microsoft Catalog

Finally, you can also directly download and cleanly install the KB5027303 update files from the Microsoft Update Catalog website. This installs fresh update files, avoiding any corruption.

Here are the manual install steps:

  1. Visit

  2. Search for KB5027303 and download the latest revision

  3. Unzip the archive once downloaded

  4. Right click the .msu file and select ‘Run as administrator‘ to install it

  5. Restart your PC when prompted

While more hands-on, this completely refreshes the update files and performs a clean install, circumventing any issues impacting Windows Update itself.

Wrapping Up

Hopefully with one of the solutions outlined, we can get your Windows 11 installation up and running with the KB5027303 update applied. As fellow tech enthusiasts, keeping our system software updated is an important way we can optimize performance and take advantage of the latest features and security protections.

I enjoy getting nerdy with keeping my PC fine tuned, so if you run into any other update issues or errors, don‘t hesitate to reach out! I‘m always happy to research solutions and share what I find. We‘ll get you fixed up.

Let me know if any of these suggestions do the trick to get your KB5027303 update installing smoothly! It can be a tricky one, but where there‘s a will, there‘s a way. Keep on tinkering my friend!


Written by Alexis Kestler

A female web designer and programmer - Now is a 36-year IT professional with over 15 years of experience living in NorCal. I enjoy keeping my feet wet in the world of technology through reading, working, and researching topics that pique my interest.