In this article, we will discuss possible causes and solutions for an error related to Windows Defender and other update services. If you encounter an error when trying to update Windows, the steps below will help you resolve the issue. Possible causes include the inability to download updates or problems with installing the package. It is also possible that two important Windows services – Windows Update and BITS (Background Intelligent Transfer Service) – are not functioning properly.
Option 1: Troubleshooting Tools
Previously, there was a small application on the Microsoft website that automatically resolved update issues. Now, this function is built into the operating system.
1. Open the Start menu and go to “Settings” (gear icon).
2. In the “Windows Settings” section, select “Update & Security”.
3. Go to “Troubleshoot” and select “Additional troubleshooters”.
4. Run the troubleshooter for Windows Update.
5. The system will automatically check the services and applications responsible for updates. If problems are detected, apply the fixes by clicking “Apply this fix”.
6. Restart the system before attempting to update the operating system.
Option 2: Deleting Temporary Update Files
If the error is due to the update cache, follow these steps:
1. Disconnect your computer from the Internet.
2. Open Command Prompt as an administrator.
3. Stop the services using the commands:
net stop wuauserv
net stop bits
4. Navigate to the folder C:\Windows\SoftwareDistribution and delete all files.
5. Restart the services using the commands:
net start bits
net start wuauserv
6. Reconnect to the Internet.
These steps will help clear the update cache and likely fix the error.
Option 3: Checking System File Integrity
Some system files responsible for updates may be corrupted. You can restore them as follows:
1. Open Command Prompt as an administrator.
2. Enter the command:
sfc /scannow
3. If errors are detected, run the command:
dism /Online /Cleanup-Image /CheckHealth
4. Restart the system after executing the commands.
Option 4: Restoring NET Framework
Some update elements depend on NET Framework. If this package is damaged, errors may occur:
1. Go to the official Microsoft website and download the “Microsoft .NET Framework Repair Tool”.
2. Run the utility and follow the instructions.
3. If necessary, download and install the latest version of NET Framework.
Option 5: Manual Update Installation
Error 0x80070643 may be related to the system’s inability to install the Windows Defender component:
1. Go to the official Microsoft website.
2. Find the update for Microsoft Defender Antivirus for your version of Windows and system architecture (32 or 64 bit).
3. Download and install the update.
4. Check the success of the installation through “Settings” => “Update & Security” => “Windows Security” => “Virus & threat protection”.
Option 6: Downloading Updates from the Website
To download updates from the Microsoft website:
1. Go to the official Microsoft website for downloading updates.
2. Enter the update number in the search field.
3. Download and install the update, considering your system architecture.
Option 7: Using Third-Party Software
You can use third-party utilities to update, such as Windows Update Minitool:
1. Download the utility from GitHub.
2. Run it and find the available updates.
3. Install the necessary packages.
Option 8: Enabling Antivirus and Firewall
Sometimes, when the antivirus or built-in firewall is disabled, the system may refuse to download updates:
1. Make sure that the antivirus and firewall are enabled and working.
2. In services, set the startup type for the firewall to “Automatic”.
Option 9: Configuring DNS
If connection issues arise, set Google’s DNS servers:
1. Press the Win+R keys combination.
2. Open network connections ncpa.cpl.
3. In the properties of the connection you are using, set the DNS addresses to:
8.8.8.8
8.8.4.4
Option 10: Additional Measures
If previous methods did not help:
1. Use a different internet connection.
2. Disable proxy and VPN.
3. Perform a system restore.
4. Check the system for viruses.
5. Check the disk for bad sectors.
6. Perform a comprehensive system cleanup.
7. Consider a clean installation of the operating system using the utility from Microsoft.
These steps will help you fix the error and restore the system to normal operation.
