Windows has become one of the most commonly used operating systems globally, which is a group of several proprietary graphical operating system families, developed and marketed by Microsoft. With time several changes have been made to it such that the system is updated to provide a better user experience. The Microsoft Windows Update is the service provided by Microsoft that allows the users to download Microsoft Windows software updates from the internet and install them on their devices like laptops, PC, etc. Also, read about: Know The Solution For The Error: “The File Is Too Large For The Destination File System” We are going to focus on the Windows error 0x80070643 in this article that is usually encountered during such updating processes. All the information about this error and its causes along with the techniques to fix it would be covered. What is Microsoft Windows Update error 0x80070643? The Microsoft Windows Update Error 0x80070643 is a common issue faced when the user tries to install a new update on their devices. This error can be easily identified as even though the statement ‘Update successfully installed’ would be displayed and stored on the Update history, it would fail to function or perform. This is an error that causes hindrances to the user’s need to update their operating system and it can be caused by various reasons. Some of the possibilities that might cause this error is as follows: Corrupted databaseRequirement of repairing the .NET frameworkMissing system filesMalfunctioning of drivers This error is displayed mainly as the result of misconfigured system settings, malware or virus affecting the device, and improper installation of new system programs such that the older versions were not removed properly. So it is always recommended to run the antivirus software on the device and then check for the system’s functioning, before proceeding to the other solutions. Another reason that might cause this error is improper shutting down of the PC or laptop or sudden disconnection from the power source while the system is still being used. The update that was introduced for Windows 10 (known as the KB4048955 update) is proven to resolve and improve the elements of the system, hence preventing security vulnerabilities but the 0x80070643 bug still pops up when the user tries to install the system update. Hence, this bug is also known as the Windows Update installation error code; a site is usually displayed during the installation of the updates. How to fix the 0x80070643 update error in Windows? Now that we have understood about this error that occurs during updation and installation, this error can be differentiated into two types and check out the solutions to fix each type: 1. The 0x80070643 error on Windows Update Here are the techniques that can be used to rectify this error caused during updating the Windows OS. Also, check out: 10 Easy Steps To Tackle Steam Disk Write Error Issue And Play Uninterrupted 2. Installation of the latest .NET Framework The .NET framework is an important factor for the installation of software on your device, hence if it is missing or corrupted then the updating process might fail. Here are the steps to download the latest .NET Framework from Microsoft and install it on your laptop or PC: Step 1 Open Microsoft’s .NET Framework download website. Click here to do the same. From the list of versions, choose the latest version of the .NET Framework. Step 2 Click on the download option and follow the instructions to install it on your device. Now try running Windows Update and check if the process finishes successfully if not try the following techniques. 3. Detect the corrupted files The corrupted files on your computer might be a reason behind the unsuccessful Windows Update installation. The SFC scan would help to find these corrupted files on the system and also replace them with the right files. Follow these steps to run an SFC scan and find out the issue causing files: Step 1 Go to the Start menu and type ‘cmd’ to open the command prompt. Step 2 Once the command prompt menu is displayed, right-click on it to select the ‘Run as Administrator option. Step 3 Now, on the displayed command prompt, type the command ‘SFC /scan now’ to initiate the scan and press ‘Enter’. Wait until the scan is completed and try updating Windows now. If the reason was corrupted files, then this technique would rectify it to function properly. 4. Manual updates of installation and Windows Defender Antivirus This is a technique in which the user must try manually updating the drivers and the Windows Defender Antivirus to ensure everything is updated to their latest version. To download the Windows Defender Antivirus on your PC, visit the official Microsoft website and search for its latest version that suits the device, and download it. Once downloaded, install the update on your PC and restart your computer. Now try updating the software. Here are some other techniques that you can try if the issues persist Restarting the PC Try restarting the device after installing the updates and check the functioning. Windows Installer service Restarting the Windows Installer service might also help as its faulty configurations would result in this error. Once this service is restarted, the error would get rectified. Follow these steps to restart the Windows Installer service: Use the shortcut Windows key + R, to access the Run menu.In the space provided, type ‘services.msc’, and press ‘Enter’ to run the command.From the list, click on the Windows Installer service and then click on the ‘restart’ option. This would restart the service hence rectifying the issues related to it. Finally, try reinstalling the software or application and check for any issues. Other conditions such as stability and bandwidth of the internet connectivity might also be causing the trouble, so check it before proceeding with the above-mentioned fixes. Also, read about: Tired Of Seeing The Error 500? Learn About It And Fix It Yourself! In this article, we have covered everything about the error 0x80070643 and the different techniques to fix it. Hope this was useful for you to solve the issue of stopping the proper updating and installation of the Windows OS in your device.