BEST FIX: Steps to fix error 8024402F

Error 8024402F is a windows  update error. Usually, it is not noticeable and most of the users notice it when they try to install or run windows updates manually.

You must know that in product environments windows updates should always be turned off, for home and personal use, they are fine but not if you have important data without any back up.

Techs like us prefer keeping the updates off unless we test them on a staging systems, if all goes well then we do the update. The reason why i am writing this is to make you aware that updates are not always successful and do not always go with the flow.

In my years of IT Experience; this has caused several issues with many of the home users i support.

This guide is a little complicated for a non techy; but if you can just follow the steps you’re issue with the updates will  be resolved. This is how it appears on the user-end.

Code 8024402F Windows update encountered an unknown error

In order to fix this issue; we need to check the update logs file. And in order to open the logs file, the easiest way is to press and hold the CTRL key and Press R (this work’s on almost all versions of Windows including Windows 10)

In the run dialog, type windowsupdate.log and Click OK

After you click OK; a note pad file will open. The first column/field represents the date; scroll down to the bottom so we can see the latest entries in the log file. Every time, you run windows update, a record/entry is added into the log file.

Notice the URL/Link above, which i copied as

And it indicates, that the update has failed. Now we’re going to begin troubleshooting this. A General idea here is that your firewall, router, anti virus or a malware on your PC could be blocking this file from being downloaded.

To test, copy/paste your url of the update in your browser and attempt to download, and see if it works? 

If it does, you can install the update manually by opening command prompt  in administrator mode.

a) Click Start

b) Type CMD

c) Right click CMD and select Run As Administrator

In the black command prompt, execute the following command:

where c:\update\myupdate.cab is the location if your file, if it was downloaded in the downloads folder, then this should be C:\Users\Username\Downloads\updatefile.cab

When you execute the above command in command prompt, the update will be installed. You can then re-run windows updates.

If it doesn’t works, do these general checks

then try the  following:

a) Turn off anti-virus

b) Turn off firewall

c) Disable router firewall, make sure no activex filters are setup.

d) Make sure you can access internet (if not); check router, modem and DNS Settings. I have another article on setting up public dns servers, which you can search on google by typing dns_probe_finished_nxdomain appuals

e) Reset Internet Explorer (Win Key + R -> type inetcpl.cpl -> Advanced Tab -> Reset -> Delete Personal Settings)

f) Try a different web browser.

If it still doesn’t works; then 

Since this issue involves various checks, i understand that you may need additional assistance. For this; feel free to post in the comments section below.

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