Win Update KB5017321 Cumulative Update for Windows 11 Build 22621.521 (22H2) - Sept. 20

fg2001gf11F · Sep 20, 2022

Just updated my public Build to 22621.521 via W.U.

Edition Windows 11 Pro
Version 22H2
Installed on ‎9/‎20/‎2022
OS build 22621.521
Experience Windows Feature Experience Pack 1000.22634.1000.0

Also, I just downloaded official MS 22H2 ISO with MCT, it is indeed at level 22621.382.

App & browser control are back to normal.

Scott · Sep 20, 2022

I'm bring offered this update, but it won't download. Is it just for insiders?

hsehestedt · Sep 20, 2022

Scott, what is your build? If you are on an insider build, that would be the problem. KB5017321 will bring 22621.382 up to 22621.521.

EDIT: Try downloading the update from the Update Catalog manually.

Go to this page:

Microsoft Update Catalog

Make sure to select KB501731 for x64 (NOT ARM64). After downloading, right-click, choose properties, then check the box to "Unblock". You can then run the update manually. If it still fails, at least it may give you a better error message.

cereberus · Sep 20, 2022

WU update kept failing but downloading MSU worked. Now on 22621.521 RTM i.e. not an Insider version.

One blinking issue - NO FE TABS!

Had to use vivetool to reenable!

cereberus · Sep 20, 2022

Now this is stuipid PC is now downloading cumulative update after MSU installed it!

MS has really made a mess of this overall build update!

Brink · Sep 20, 2022

cereberus said:
Now this is stuipid PC is now downloading cumulative update after MSU installed it!

MS has really made a mess of this overall build update!

Well, to be fare, it is best to wait for it to be available via Windows Update to help avoid issues like this.

cereberus · Sep 20, 2022

Brink said:
Well, to be fare, it is best to wait for it to be available via Windows Update to help avoid issues like this.

I did let WU get it - it found it ok but kept failing to install.
Then I used MSU and it installed ok but then WU decided to reinstall it anyway.
Got there though in the end.

Just tidying up now getting rid of Windows.old.

SFC picked up some errors but fixed them - ok now.

This has been hard work and that is from somebody with a (I humbly believe) reasonable skill level!

f14tomcat · Sep 20, 2022

cereberus said:
Now this is stuipid PC is now downloading cumulative update after MSU installed it!

MS has really made a mess of this overall build update!

I got all the same that you did. All the WTFs and exactly the sequence. FE tabs they said would be in a couple of weeks with one of their "Moments" updates. Sounds like an update from the Hallmark Channel. A moment? That's 90 seconds, I believe. OED says so, too.

docfreed · Sep 20, 2022

Why do the idiots at Microsoft change my themes every time they throw an update at us?

Not Myself · Sep 20, 2022

Brink said:
Well, to be fare, it is best to wait for it to be available via Windows Update to help avoid issues like this.

If we are being "fare" [sic], does that make us cannibals?

Fabler2 · Sep 20, 2022

cereberus said:
I did let WU get it - it found it ok but kept failing to install.
Then I used MSU and it installed ok but then WU decided to reinstall it anyway.
Got there though in the end.

Just tidying up now getting rid of Windows.old.

SFC picked up some errors but fixed them - ok now.

This has been hard work and that is from somebody with a (I humbly believe) reasonable skill level!

Same here, one was called 'cumulative' and one was 'security'

Scott · Sep 20, 2022

cereberus said:
I did let WU get it - it found it ok but kept failing to install.
Then I used MSU and it installed ok but then WU decided to reinstall it anyway.
Got there though in the end.

Just tidying up now getting rid of Windows.old.

SFC picked up some errors but fixed them - ok now.

This has been hard work and that is from somebody with a (I humbly believe) reasonable skill level!

I went through the exact same sequence. Also managed to enable FE Tabs.

fg2001gf11F · Sep 20, 2022

Brink said:
Release notes will be posted when made available by Microsoft.

Check Windows Updates

You can upgrade with the new official Windows 11 Build 22621.382 ISO file, then update to Build 22621.521 via KB5017321.

Direct download links for KB5017321 MSU file from Microsoft Update Catalog:

Download KB5017321 MSU for Windows 11 v22H2 64-bit (x64) - 223.6 MB

Download KB5017321 MSU for Windows 11 v22H2 ARM64 - 302.2 MB

Troubles using the official MCT ISO.
The update with W.U. worked fine on one machine, but when I used the official ISO on a second box it went up to 22621.382 with no problems, but the subsequent check for update just went into a loop trying to download and install this cumulative update over and over.
I could not get out from this loop.
I remember this bug happening before after updating with ISO, looks like the bug is now back.

I will have to restore 22000.978 and just do the whole update to 22621.521 with W.U.

Ernimus Prime · Sep 20, 2022

I haven't gotten the 22H2 update through WU. I downloaded the standalone and tried to update manually. Pop up says the update isn't applicable for my computer. I am on the newest 21H2 build of 2000.1042. I tried SFC and Dism. No change

fg2001gf11F · Sep 20, 2022

fg2001gf11F said:
Troubles using the official MCT ISO.
The update with W.U. worked fine on one machine, but when I used the official ISO on a second box it went up to 22621.382 with no problems, but the subsequent check for update just went into a loop trying to download and install this cumulative update over and over.
I could not get out from this loop.
I remember this bug happening before after updating with ISO, looks like the bug is now back.
I will have to restore 22000.978 and just do the whole update to 22621.521 with W.U.

View attachment 39746

Windows Insider

Logs error 0x800f0806 on every retry.

hclarkjr · Sep 21, 2022

fg2001gf11F said:
Troubles using the official MCT ISO.
The update with W.U. worked fine on one machine, but when I used the official ISO on a second box it went up to 22621.382 with no problems, but the subsequent check for update just went into a loop trying to download and install this cumulative update over and over.
I could not get out from this loop.
I remember this bug happening before after updating with ISO, looks like the bug is now back.
I will have to restore 22000.978 and just do the whole update to 22621.521 with W.U.

View attachment 39746

same thing is happening to me, how do you fix this?