Fix Windows Update Error Code 0x8007064

Most Windows OS users complain about a problem with Windows updates. While changing the window’s defender, an error occurs. On the screen, it appears with the message: “Definition Update for Windows Defender – Error 0x80070643”.

The problem prevents the defence from being updated. As a result, it signifies a problem with the installation. Even if Windows is downloaded correctly, the pop-ups disrupt the process and prevent it from being installed correctly and entirely in the machine.

How To
How To

Fix Windows Update Error 0x80070643

A faulty file in your computer system or data left behind from a previous antivirus product might also result in the error code 0x80070643. Therefore, many people are looking for ways to fix the fault that has occurred in their computer system.

Because there are numerous methods for resolving a wide range of problems, you must first determine the root cause of the problem before implementing a remedy on your computer system. Here are a few ideas to help you get to the bottom of what’s going on before you get started. Take a look at this.

1. Reboot

You may think this is a simple and pointless task. However, this can sometimes swiftly address a large number of issues. So, if you’re dealing with a problem like this, you should first try this way first.

Installing a programme is as simple as restarting your computer and doing so again. In some cases, restarting the PC is necessary to complete a new installation after a prior one has been completed.

2. Remove Antivirus Software

It’s possible that the antivirus software on your computer will interfere with the Windows update you’re trying to install. So in order to address this issue, you must first disable your Antivirus and then see if the problem has been resolved.

Go to Windows Update after this and see if you can get an upgrade. It’s possible that the error code 0x80070643 will disappear after you complete the procedure. Follow these instructions to turn off the Antivirus.

Step 1: As a first step, you should right-click the Antivirus icon on your PC and select “Disable.”

Step 2: Choose the time period for which you want to disable the Antivirus. There is a recommended time frame of 15 to 30 minutes.

Step 3: Open Windows Defender and make sure it’s running. Windows Defender Update Failed with Error 0x80070643? Check to see if it’s still there or not!

3. Update the.NET Framework

Installing system upgrades relies heavily on the.NET framework. So, if you don’t already have the current version of the.NET framework installed on your PC, download it from Microsoft’s website and install it. To get the.NET framework, simply follow these instructions:

Step 1: The first step is to visit the.NET framework’s official website.

Step 2: Next, select the most recent version of the.NET framework. If you’ve already downloaded it, you’ll be able to access older versions of the.NET framework.

Step 3: Select “Download” and wait for the download to begin. In order to complete installation, open the file that was installed on your PC or laptop and follow the instructions that were provided on it.

Finally, after downloading the programme, check for Windows updates and see if you can update your computer system’s operating system to the latest version.

4. Restart the Windows Installer Service 

One of the most common causes of the error number 0x80070643 to occur is a malfunctioning Windows installation service. Reinstalling the Windows Installer service on your computer is an option. Go through the following stages in order to complete this procedure:

Step 1: To begin, hit Windows key + R at the same time on the keyboard.

The second step is to open the Windows service by typing “services.msc” and then pressing Enter on your keyboard.

Step 2: Lastly, select Windows Installer and restart your computer after selecting it.

5. Run a Scan or SFC on Your PC Now!

Errors might be caused by files on your computer that are damaged or malicious. Because of this, the Windows may not be able to update, resulting in an error code.

In this scenario, the SFC scan is a valuable tool for scanning and replacing faulty files in your computer system. Follow these steps to run an SFC scan on your computer:

Step 1: The first step is to press the Windows key and X at the same time. Command Prompt (Admin) is the next option.

Step 2: Then, in the command prompt, write “SFC /scan now” and hit Enter. Wait for the scanning to be finished.

Step 3: Finally, make sure to perform any necessary system upgrades right away. In that case, the 0x80070643 fault has been resolved.

6. Use a Troubleshooter 

The following instructions are for troubleshooting:

Step 1: First, open the Start menu and type “troubleshoot” into the search field. If there is a problem, the troubleshoot menu will be available.

Extend the Windows Update option and then press the Run troubleshooter button. Then, follow the on-screen instructions to execute the Windows update troubleshoot.

Step 2: Now, restart your computer and see if the error code 0x80070643 can be fixed.

7. System Restore 

The Windows update system may be restored and made as stable and functional as it was using the system restores feature. It’s simple to use and doesn’t require any data or information to get started. It’s possible that the drivers or programmes you installed after the restoration point may be destroyed.

So if you get the error code 0x80070643 while installing Windows Update, you may simply build a system restore point and continue using your computer without any issues.

8. Reset Windows Update Components to Fix the Problem

Step 1: Press the Windows key and X at the same time. The command prompt window will open (admin).

Step 2: Then, type the following commands and press Enter after each one to stop Windows Update:

stop wuauserv on the net
Stop cryptSvc
There are no more bits on the net
msiserver is stopped with the command net stop msiserver.

Renaming the Software Distribution Folder is as simple as typing in the commands listed below on your computer’s keyboard. After each one, press the “Enter” key:

SoftwareDistribution is located in C:Windows SoftwareDistribution.old Reinstalling Catroot2 at C:WindowsSystem32catroot2

Finally, execute the following commands to restart the Windows Update Services. After each instruction, hit the “Enter” key on your keyboard.

Start wuauserv on the net
cryptSvc can be started using the command net start cryptSvc
starting up the bits and the msiserver over the network

Step 5: Restart your computer to apply all of your saved modifications. Assuming it’s still there, look for an error code of 0x80070643.

9. Update for Windows Defender 

When it comes to using Windows 10’s built-in system restore, the concept is hazy. In addition, the constant rebooting of the computer system frustrates its users.

So, if you’re encountering the same issue and seeing the error code 0x80070643 on your monitor, here’s what you should do. If that doesn’t work, you’ll need to remove the Windows defender update and restore the window to its original form. To do so, follow the steps outlined below:

Step 1: To begin, open the Run window by pressing Windows + R at the same time. Open Programs and Features by typing “appwiz.cpl” and pressing Enter.

A View Installed Updates icon will appear on the left side of your screen, which you should click on next.

Step 2: Next, click on Microsoft Windows at the bottom of the page. Windows Defender or KB4054517 Update, which causes the error code 0x80070643, can be right-clicked.

The final step is to uninstall the programme and restart your computer to see if the problem has been fixed.

10. Using Administrative Permissions to Make a New Change

To install the updates on your computer, you must have administrator privileges. So, if you’re using a guest or less-privileged account because you haven’t created an account yet, you should do so first. Call your system administrator if you don’t know if your machine is part of a specific domain.

11. Run the SubInACL Tool 

It is well-known that the.NET Framework 2.0 has an issue that persists because of erroneous access control list permissions on registry hives that prevents some apps from being installed.

In such a scenario, the corrupt file registry permissions can be repaired using the SublnACL programme. Setups that use MSI.
Follow these actions to put these strategies into action:

Step 1: Download and install the SubInACL utility on your computer. The following platforms are supported:

C:Program Files (x86)Windows Resource Kit

Step 2: Copy and paste the code into a notepad file that you’ve created in step two. To save the file, go to the option file and select “Save As.”

In the future, rename the file to reset.cmd. Finally, set the file type to “All Files” before saving. When you’re done, right-click the Script and select Run as administrator.

Wait for the reset to occur.

The cmd script has finished. Try again to install the software that was previously unable to be installed on your computer.


Finally, we would like to say that all of the solutions listed above are the finest and most appropriate for your computer system to cure the Windows update error.

There are many ways to accomplish a certain goal, and each one has its own set of established techniques. Consequently, if a mistake cannot be classified, it can be investigated to discover the cause and then the method associated with it can be applied.

To make things easier for you, we’ve included not only a few options for resolving the problem, but a slew of them. However, there is a danger that these procedures will not provide a long-term remedy, but there are more odds of success.

Preparation is key, so take your time to go through the procedures and then follow them step by step on your computer. We’re hopeful that we can come up with a solution for you.