Windows update error 0x800f081f

New Contributor

Hi, so I haven't been able to update my laptop the past 2 months I would say, because of that error code. I am Trying to install 2021-10 Cumulative Update Preview for Windows 10 Version 21H1 for x64-based Systems (KB5006738), and it gets to "Status: Installing - 100%" and then it sits there for about 10-15 minutes which then it gives me the error. Also it says "Your device is missing important security and quality fixes." In red. 


My Windows Spec: 

Edition: Windows 10 Home

Version: 21H1

OS Build: 19043.1151

Experience: Windows Feature Experience Pack 120.2212.3530.0


I have already looked everywhere on here, and I came across a different post, and someone had mentioned like 3 different things to try, which I tried all 3 and still did not work.  I've also looked it up on google, and tried a few things people mention there. But still no luck.


Also this is my first time posting here, so I apologize if I did something wrong. 

14 Replies


I have the same problem: 2021-10 Cumulative Update Preview for Windows 10 Version 21H1 for x64-based Systems (KB5006738)

We couldn't install this update, but you can try again. (ox80070026.

Is there any point?

I may reinstall windows, but I'm not sure if I can keep most of my programs that I already have installed. If I'm not able to, I guess I'm SoL @DaveO1110 

@JeffyEpstein  Hi

Start fresh with a clean installation of Windows 10 (

Unfortunately, a clean installation removes everything and reinstalls the system!

Have you tried downloading the update assistant?

If you click update now your files and applications will remain on the disk.

Best regards

I just tried, and it says "Congratulations you have updated Windows 10"
But then i go to my settings and go to update windows, and it still shows I have same update I have been trouble trying to install.
And did you perform a reboot?

My update finally went in, then I downloaded and installed Windows 11, no more hassles. - (so far.)



I am also experiencing the same problem, can you please tell me how did you get rid of it.Screenshot 2021-11-02 131844.jpg

There was another update available for the NET framework, after that installed, the other update then went in, so I can only assume it needed that update before the last one.

@DaveO1110 how did u got that NET framework update from??



Hello, you can try to download manually, but you have to choose the right file , for the Windows version - If you have 21H1 , or 20H2 - you need to check it!

of course, search in your language.


It just came when I made an Update check. Often It says you are up to date, then when you tell it to check, it finds more updates!
Same problem as in the original post.
I went to
and selected the Update Now button for the 'Windows 10 November 2021 Update'
which updated me to 21H2 without any issues.
Thank you for confirming that it works = it helps others!