Need to get rid of Code 646 error issuesAugust 23, 2020 by Jimmie Bourn
This guide describes some of the possible causes that can cause the Code 646 error, and then describes possible methods to resolve the problem.
Error code 646 is common for downloading and installing Windows Update files through Windows Installer. This usually happens when updating Microsoft Office and when using a firewall, but it can happen in other situations as well, especially when using Windows Update.
Overview - What Is Windows Update Error Code 646?
Windows Update Error Code 646 is an error generated by Windows Installer that typically occurs when you try to install updates for Microsoft Office.
If Windows Installer has a problem updating Microsoft Office, you can do so by seeing this error. This means that an error was encountered and the requested or automatic update could not be completed. Thus, you should try to fix the problem before attempting future updates. If the problem is not resolved, it is unlikely that new updates will be downloaded and installed.
Common Error Messages For Windows Update 646 Error Code
Windows Update Error Code 646 can manifest itself in several ways. If an error occurs, you will see one of the following messages:
While the last example does not specifically mention error code 646, it is an error message related to updating Microsoft Office, as you can see in the solutions below. below.
Reasons For Receiving The O Windows Update 646
You will receive this generic error code when Windows Installer encounters an error. Error code 646 is common for downloading and installing Windows Update files through Windows Installer. This usually happens when updating Microsoft Office and when using a firewall, but it can also happen in other situations, especially when using Windows Update.
You will usually see Windows Update error code 646 if there is an incorrect value in the registry.
Solutions - Fix Windows Update Error Code 646
Using a firewall, be it the built-in Windows firewall or third-party firewall, sometimes prevents Windows Update from downloading and uploading updates. install on your computer. To fix this problem, you can turn off the firewall while downloading and installing updates. Once complete, you can reactivate the firewall. This is not an ideal solution, as there is a risk of disabling the firewall and therefore a possible risk to the system.
In addition, your registry may containis the wrong entry causing this error when invoking Windows Update. To resolve this issue, perform a Windows System Restore or manually perform the registry fix described below.
There is also a repair tool that you can download directly from Microsoft's website that will automatically repair the correct registry keys for you. This is available on the Microsoft support site.
You can also restore a specific registry key yourself by opening the registry and running it, then start it and typing "regedit". Then you should find the following keys:
If the value is different, replace it with the correct data and try updating again. Do not edit the registry if you are not comfortable with it.
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