How to Fix KB2267602 Fails to Install on Windows 10?

Microsoft has released KB2267602 as a security update for its Windows Defender, which helps protect Windows 10 or Windows Server computers from malware and other security threats. However, some users report that KB2267602 fails to install.

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Then, let’s see how to fix the KB2267602 not install issue.

Solution 1: Uninstall Third-Party Antivirus

If you are unable to install KB2267602, the culprit might be a conflict between Windows Defender and third-party antivirus software. So if you have installed one on your computer, it is recommended to uninstall it to fix the error. You can go to Control Panel or Settings to do that.

Solution 2: Run the Windows Update Troubleshooter

Windows Update Troubleshooter is a Windows 11/10 built-in tool that enables you to detect and fix errors related to corrupted updates or other Windows update issues. So, you can try running the troubleshooter to fix the “KB2267602 fails to install”. Here’s a tutorial.

Step 1: Press Windows + I to open the Settings application.

Step 2: Go to System > click Troubleshoot.

Step 3: Click Other troubleshooters to expand all troubleshooters, and then click Run next to the Windows Update section.

Step 4: Now, this troubleshooter will scan issues associated with the Windows Update components. If any fixes are identified, click Apply this fix and follow the on-screen instructions to complete the repair.

Solution 3: Reset Windows Update Cache

If you have trouble running Windows Update, there is likely a problem with the update file, or the file is not completely cleared for download or is damaged. You can reset the Windows update cache.

Step 1: Type Command Prompt in the Search menu. Then right-click it to choose Run as administrator to open it.

Step 2: Type the following command one by one:

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

Step 3: Next, run the following command one by one.

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

Solution 4: Run Disk Cleanup

Almost all versions of Windows have integrated the Disk Cleanup feature. The Disk Cleanup feature makes it easy to delete unnecessary files on your computer and save space. Thus, this solution is to perform Disk Cleanup. Here are the steps:

Step 1: Press the Windows + S keys at the same time to open the search. Then type Disk Cleanup and select the first option.

Step 2: Select the drive on which Windows has been installed and click OK to continue.

Step 3: Click the Clean up system files option and click OK to start cleaning.

Solution 5: Install Install the KB4577266 Update Manually

KB4577266 is a Servicing Stack Update for Windows 10. If for some reason your system does not have it, you should download and install it to see if it fixes the issue.

Step 1: Open your browser and go to the Microsoft Update Catalog.

Step 2: Search for KB4577266 update.

Step 3: Find the correct update based on your operating system version and click Download.

Step 4: Follow the on-screen instructions and install the update. Reboot your system.

Final Words

If you run into the “KB2267602 fails to install” issue on Windows 11/10, try the solutions above to easily get rid of that trouble. It is recommended to back up your important data with Minitool ShadowMaker Free to better safeguard your computer.