KB2267602: What You Need to Know About This Windows Defender Update

Are you looking to stay on the cutting edge of cybersecurity and ensure your system is protected against the latest threats? Look no further than the latest update, KB2267602, a critical component for improving your digital security.

In this blog, we’ll firstly  delve into the importance of keeping your security intelligence up to date. Secondly, we’ll discuss the benefits of installing KB2267602, and how it can help protect your devices from emerging cyber risks.  

While the KB2267602 cumulative update is a crucial security update, users may encounter an error message (There were problems installing some updates, but we’ll try again later.) or other issues when attempting to install it.

For instance, common problems include conflicts with third-party antivirus software, which can interfere with the update process of Microsoft Defender.

However, running the Windows Update Troubleshooter or disabling conflicting antivirus programs may resolve these issues.

So, let’s explore the ins and outs of this essential security update and keep your systems safe.   

What is KB2267602 update ?

This update is a security intelligence update for Microsoft Defender. Firstly, it provides enhanced protection against the latest threats such as malware and viruses.

These security updates are usually installed automatically, however, occasionally users may encounter an error where the update does not install, resulting in a Retry message.

Additionally, the KB2267602 update serves as the daily virus definition update for Windows Defender. Users experiencing issues can search forums for solutions.

It retains the same KB number, yet the content, which encompasses virus definitions, may undergo multiple changes within every 24-hour period as the Microsoft Malware Protection Center (MMPC) updates the file.

What it does:

  • Firstly, delivers the most recent virus definitions, malware signatures, and other threat information to your computer.
  • Secondly, with this update, Microsoft Defender can more accurately identify and block potential security risks.
  • Furthermore, it improves your overall system security.

Why it is important:

  • To begin with, cyber threats are constantly evolving and new malware appears all the time.
  • Moreover, keeping Security Intelligence definitions up to date ensures that your antivirus remains effective in protecting your device.
  • Furthermore, outdated definitions can leave you vulnerable to new attacks.

If you are having problems with this update, it is often due to interference from third-party antivirus software, a corrupted cache, or corrupted system files. In addition, we have provided detail solutions in further sections to solve this problem.

How to download KB2267602 cumulative update ?

In most cases, you shouldn’t need to download the KB2267602 update manually. Here’s why:

  • Automatic Updates: If you’re using Windows 10 or Windows Server with automatic updates enabled, you should receive and install KB2267602 through Windows Update.
  • Security Risk: Downloading updates from unofficial sources can be risky. Malicious actors might distribute malware disguised as updates.

Here’s what you can do instead:

check for updates for KB2267602 in system
  • Check for Updates: Manually trigger Windows Update to see if KB2267602 is available. Go to Settings > Update & Security > Windows Update and click “Check for updates.”

Also Check: What are the latest updates in Windows 10 KB5021235 ?

What are the causes behind the failure of the KB2267602 update ?

The failure of the KB2267602 update can be attributed to several factors, including:

  • Interference from third-party antivirus software: Firstly, non-Microsoft security programs can sometimes prevent the update from installing properly.
  • Corrupted cache: Secondly, a corrupted update cache can cause the update to fail.
  • Damaged system files: Thirdly, corrupted or missing system files can lead to update installation errors.
  • Download error 0x80070643: Additionally, this error code can indicate issues with the update process, which may resolve after a system restart or require further troubleshooting.
  • Insufficient disk space: Moreover, if there isn’t enough space on the system drive, the update may not install.
  • Outdated system drivers: Furthermore, drivers that are not up-to-date can cause compatibility issues with new updates.
  • Network connectivity issues: Likewise, problems with internet connection can disrupt the download and installation of updates.
  • Conflicting software: Coupled with, other software installed on the system might conflict with the update process.
  • Incorrect system settings: As well as, certain system settings or configurations can interfere with the update.
  • User account permissions: Finally, lack of administrative privileges can prevent the update from installing.

To address these issues, users can take steps such as freeing up disk space, updating system drivers, checking network connections, reviewing software conflicts, adjusting system settings, and ensuring they have administrative rights when attempting to install the update.

However, if problems persist, seeking assistance from Microsoft Support or a professional technician may be necessary.

Also Check: How to upgrade Windows 7 to Windows 10 ?

How to fix Windows defender antivirus KB2267602 update ?

The KB2267602 update for Microsoft Defender is a Security Intelligence Update that enhances protection against threats like malware and viruses. If you’re encountering issues with this update, here are some methods to resolve it:

Disable Third-Party Antivirus

  • Firstly, temporarily disable any third-party antivirus software you have installed.
  • Then, try installing the update again.

Use Windows Troubleshooter

  • First, click Start and select “Settings”.
  • Next, go to “Update & Security” followed by “Troubleshoot”.
select update and security from settings to start windows troubleshooter
  • After that, click on “Additional troubleshooters”.
Click on additional troubleshooter from settings to fix windows defender antivirus KB2267602

Reset Update Database Cache

  • Then, open an Administrator Command Prompt.

Stop certain services

  • net stop wuauserv
  • net stop cryptSvc
  • net stop bits
  • net stop msiserver

Reset the cache

  • ren C:\Windows\SoftwareDistribution SoftwareDistribution.old
  • ren C:\Windows\System32\catroot2 Catroot2.old

Restart the stopped services

  • net start wuauserv
  • net start cryptSvc
  • net start bits
  • net start msiserver
  • Restart your computer.

Use Disk Cleanup

To use Disk Cleanup to fix the Windows Defender Antivirus KB2267602 update issue, you can follow these steps:

  • Firstly, type “Disk Cleanup” in the Windows search bar and open the tool.
  • Secondly, select the system drive (usually C:) and click OK.
  • Thirdly, click on “Clean up system files” for an advanced cleanup.
  • Additionally, again, select the system drive if prompted and click OK.
  • Next, in the list, check the boxes for “Temporary files” and any other files you wish to clean, such as “Windows Update Cleanup” if available.
  • Finally, click OK and then “Delete Files” to confirm the cleanup.

This process will remove temporary files and system files that might be causing the update issue. After running Disk Cleanup, try reinstalling the update

Also Check: How to fix system service exception in Windows 11 ?

Use Microsoft Update Assistant

  • Firstly, download the Microsoft Update Assistant from the Microsoft website.
  • Secondly, execute it and select Update Now.

Restart Windows Update service 

To restart the Windows Update service to fix the Windows Defender Antivirus KB2267602 update issue, you can follow these steps:

  • Firstly, press Windows + R to open the Run dialog box.
  • Secondly, type services.msc and press Enter to open the Services console.
  • Next, scroll down and find the Windows Update service.
  • In last, right-click on it and select Restart if it’s running, or Start if it’s stopped.

After restarting the service, you can check for updates again to see if the KB2267602 update can be installed successfully. However, if the issue persists, you might want to consider other troubleshooting steps.

Repair System Files

Run the following commands in an Administrator Command Prompt:

  • sfc /scannow
  • dism /online /cleanup-image /restorehealth

These commands check and repair system file health.

Use Microsoft Update Assistant

Check for Updates in Windows Security

To update your virus protection software on Windows, launch the Windows Security application, navigate to the “Virus & threat protection” section, and select the option to “Check for updates” located within the “Virus & threat protection updates” area.

Manual Update

  • To obtain the latest update, you can visit the Microsoft Update Catalog, download the necessary files manually, and proceed with the installation on your system. Use CMD to fix corrupted system files

To use Command Prompt (CMD) to fix corrupted system files and address the Windows Defender Antivirus KB2267602 update issue, you can follow these steps:

Open an elevated Command Prompt

  • Firstly, press the Windows key + X and select Command Prompt (Admin) or Windows PowerShell (Admin).
  • Next, if prompted, click Yes to allow changes to your device.

Run the Deployment Image Servicing and Management (DISM) tool

Next, before running the System File Checker (SFC), it’s recommended to use the DISM tool to provide the files needed to fix corruption. Type the following command and press Enter:

  • DISM.exe /Online /Cleanup-image /Restorehealth

If the Windows Update client is broken, you might need to specify an alternative source for repair files using the /Source option.

Run the System File Checker (SFC)

  • Then, after the DISM process completes, type the following command and press Enter: sfc /scannow
  • Consequently, this command will scan all protected system files and replace corrupted files with a cached copy located in a compressed folder at %WinDir%\System32\dllcache.

Review the results

  • After that, once the scan is complete, you’ll receive a message indicating whether any integrity violations were found or if any repairs were made.

Restart your computer

  • Finally, after the SFC process completes, restart your computer to apply any changes.

This process should help resolve issues with corrupted system files that might be preventing the KB2267602 update from installing correctly.  


Keeping your Windows Defender up-to-date with the latest security intelligence updates like KB2267602 is crucial for protecting your system against evolving cyber threats.

However, while the installation process is typically automatic, users may encounter issues due to factors like conflicting software, corrupted files, or insufficient disk space.

Consequently, this blog provided several troubleshooting methods to resolve KB2267602 update failures, including disabling third-party antivirus, resetting the update cache, using system utilities like Disk Cleanup and SFC, and leveraging Microsoft’s Update Assistant.

Therefore, by following these steps and contacting customer support if needed, you can ensure your Windows Defender stays up-to-date, enhancing your digital security and safeguarding your devices against the latest malware and viruses.

Frequently Asked Question’s (FAQ’s)

Why is KB2267602 failing to install ?

The installation of KB2267602 may fail due to conflicts with third-party antivirus software, corrupted update cache, or pending hardware updates. Disabling antivirus programs, addressing any hardware update issues, and resetting the update database cache are common fixes.

What is the KB2267602 issue ?

The KB2267602 issue typically involves a failure to install a Microsoft Defender update, often due to conflicts with third-party antivirus software or corrupted system files.

What is the definition update for Windows Defender antivirus KB2267602 ?

The definition update KB2267602 for Windows Defender Antivirus is a Security Intelligence Update designed to provide enhanced protection against new threats, such as malware and viruses.

Content Writer

Smith Ron, the writer at Assistme360. He has extensive experience in crafting straightforward, step-by-step guides for technical issues. His broad knowledge ensures accurate solutions. Kindly spare a moment to drop a comment down and express your opinions. Your feedback can be valuable in assisting others who may come across similar problems.

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