How to Fix Windows 7 KB915597 Update Failed

“KB915597” is a Windows 7 Windows Defenders update to upgrade your Windows 7 old update version to a new update. However, a lot has claimed that the Windows 7 KB915597 failed and they were unable to update to the version.

This error is only peculiar to Windows 7 Windows Defender. Windows 8 and Windows 10 release users hardly complain about the failed KB915597 update.

However, if you are facing this problem, this guide will explain every detail on what to do to download KB915597 Windows 7 Windows Defender update.

If you are using the Windows Defender alone as your computer security it’s very important to upgrade to the latest version always.

What is Windows Defender?

Windows Defender is a Microsoft microprogram built for Windows computer to serve as a Windows protects and help to fight against harm popup, popunder, malicious code, suspicious downloads, and the rest of them.

The Defender is a real-time Windows Anti-virus that monitors Windows computer 24/7 when enabled. The Windows Defender is more active than some of the 3rd party anti-virus out there.

However, if you are using the Windows Defender and another anti-virus program to foster your system security, this will ensure your system is protected and secured from diverse malware or spyware.

Meanwhile, if your computer is a home computer, there may be no need to use a 3rd software to protect your computer when your Windows Defender is active.

How to Enable Windows Defender

When you buy a new Windows computer the Windows Defender will be active by default which users can turn off. However, if you are not the first user of your computer, there is a possibility that the Windows Defender has been disabled.

Therefore, you need to go through the procedures below to enable the Windows Defender on Windows 7, Windows 8, and Windows 10 version.


  1. Press Win + R to open the run command in your Windows 7
  2. Type “services.msc” and click on the OK button
  3. Scroll down the Windows Service page until you get to Windows Defender name
  4. Right-click on the Windows Defender name and select properties
  5. Navigate to the general tab >> enable >> apply

If the above is too complex for you to enable the Windows Defender, follow this direction.

Windows 7 Windows Defender

  1. Go to the search menu and type “Windows Defender”
  2. Navigate to tools >> administrator
  3. Check use this program
  4. Click Apply.

Now, once you click on the apply button the Windows 7 Windows Defender will be active. However, if your Windows Defender is already outdated, you will be notified to upgrade to the latest version which could be KB3177467, KB2267602, or another updated version available.

KB915597 Windows Defender Update

Before we proceed to download and install the Windows 7 Windows Defender update, here are some real information about the Windows 7 update.

  • Windows Update Requirement: Windows 7
  • Update Definition: (Definition 1.199.1150.0)
  • Update Code: KB915597
  • Year: 2014/2015

How to Fix KB915597 Windows 7 Update Fail

There are three known approaches to fix the Windows 7 KB915597 download update when it failed.

  • Diable active 3rd party anti-virus
  • Troubleshoot your Windows 7
  • Download Windows Defender KB915597 and update manually

Disable 3rd-party Anti-virus

If you are using a 3rd-party anti-virus alongside the Windows Defender on your Windows 7 you may likely run into problem updating to the latest version.

However, when the Windows 7 “KB915597” update failed on several attempts, disable the anti-virus first, and then go through the Windows Defender update again.

Troubleshoot Windows 7

You can troubleshoot your Windows 7 to fix the Windows Defender update that failed on an attempt to do it. Troubleshooting fixes it quickly using the Windows 7 troubleshooting software.

  1. Download the Windows 7 troubleshooting software
  2. Go to the download folder and run the troubleshooting software
  3. Make sure you are connected to the internet

With this, if there is a problem detected, the troubleshooting software will give a series of suggestions and how to fix the problem.

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