Win Update KB5077181 Windows 11 Cumulative Update build 26100.7840 (24H2) and 26200.7840 (25H2) - Feb. 10

uncyler825 · Feb 12, 2026

fg2001gf11F said:
I'll keep checking. We'll see if it shows up. I don't see it in the blogs either.

Announcing Windows 11 Insider Preview Build 26300.8155 (Dev Channel)

Hello Windows Insiders, today we are releasing Windows 11 Insider Preview Build 26300.8155 (KB 5083822) to the Dev Channel. Changes in Dev Channel builds and updates are documented in two buckets: new features, and improvements (inc

blogs.windows.com

Microsoft is working on it... just wait....

fg2001gf11F · Feb 12, 2026

uncyler825 said:
Microsoft is working on it... just wait....

omnescient · Feb 12, 2026

After each monthly CU, I run
dism /Online /Cleanup-Image >
/RestoreHealth
/AnalyzeComponentStore
/StartComponentCleanup (if required)
sfc /scannow
before running an MR system image.

Until this update (KB5077181 > 26200.7840), sfc /scannow finished within a few minutes, and usually within 10 if repairs were required.
The latest run took c. 35 minutes (with nothing to repair).
I ran the same sequence on my partner's system with the same result, again with nothing to repair.
I don't see anyone else mentioning extended times for running the scan, so I assume it must be something peculiar to our setups, as I know there are others who run this stuff regularly after updates.

gunrunnerjohn · Feb 12, 2026

omnescient said:
I don't see anyone else mentioning extended times for running the scan, so I assume it must be something peculiar to our setups, as I know there are others who run this stuff regularly after updates.

Both DISM scanhealth and SFC ran in normal times for me. My prime system did show an issue with DISM and I ran a restorehealth, also the normal time and the SFC. I didn't see any unusual delays with any of the processes, just the usual pause at 62.3% during the restorehealth run. The other two systems showed no errors on the checks.

PerpetualCycle · Feb 12, 2026

omnescient said:
After each monthly CU, I run
dism /Online /Cleanup-Image >
/RestoreHealth
/AnalyzeComponentStore
/StartComponentCleanup (if required)
sfc /scannow
before running an MR system image.

Until this update (KB5077181 > 26200.7840), sfc /scannow finished within a few minutes, and usually within 10 if repairs were required.
The latest run took c. 35 minutes (with nothing to repair).
I ran the same sequence on my partner's system with the same result, again with nothing to repair.
I don't see anyone else mentioning extended times for running the scan, so I assume it must be something peculiar to our setups, as I know there are others who run this stuff regularly after updates.

I have seen extended time in previous updates. When it happens, I just stop the scan and reboot my PC. It runs at normal speed then.

FrankW · Feb 13, 2026

omnescient said:
After each monthly CU, I run
dism /Online /Cleanup-Image >
/RestoreHealth
/AnalyzeComponentStore
/StartComponentCleanup (if required)
sfc /scannow
before running an MR system image.

Until this update (KB5077181 > 26200.7840), sfc /scannow finished within a few minutes, and usually within 10 if repairs were required.
The latest run took c. 35 minutes (with nothing to repair).
I ran the same sequence on my partner's system with the same result, again with nothing to repair.
I don't see anyone else mentioning extended times for running the scan, so I assume it must be something peculiar to our setups, as I know there are others who run this stuff regularly after updates.

I ran Dism online and SFC /scannow after KB5077181 installed in 10 minutes (with WAU) or so, both completed in a few minutes (fast) without any errors on both my 2 laptops.

eLPuSHeR · Feb 13, 2026

fg2001gf11F said:
Yes, that is true, I don't know why they removed that option from "System > Storage > Temporary files", you can use Disk Cleanup to delete the Previous Build (Windows.old).

Yup. Cleanmgr.exe works properly.

omnescient · Feb 13, 2026

gunrunnerjohn said:
Both DISM scanhealth and SFC ran in normal times for me.

FrankW said:
I ran Dism online and SFC /scannow after KB5077181 installed in 10 minutes (with WAU) or so, both completed in a few minutes (fast) without any errors on both my 2 laptops.

Thanks for those confirmations.
I ran sfc again this morning and it took c. 1/2 minute in CP & < 20 seconds in PS - not sure why PS should be quicker, but that's another story (or maybe it isn't :>)

omnescient · Feb 13, 2026

PerpetualCycle said:
I have seen extended time in previous updates. When it happens, I just stop the scan and reboot my PC. It runs at normal speed then.

As you suggest, maybe it was the reboot that resolved what ever the issue was. I thought it may have been related to my setup, but more likely it was just a W11 idiosyncracy that decided to come out and play at the time. I didn't notice any unusual activity in task manager that would account for the original sfc crawl.

hader · Feb 13, 2026

Well... MS did it. The worst update ever seen for 25H2.
After the 7840 update; DISM /Scanhealth and SFC /Scannow gave no errors.

- Certificate CA2023? Nope. Nothing to be found in the Intermediate store. Only the old PCA2011.
- Drivers. 7705 replaced some 166 files all pointing to the old PCA2011. 7840 replaced yet again 11 drivers. Also pointing to the old PCA2011.

- Component Store? A total mess!!! From an average of 177 package, with 7840 that went up to 253!!
Counted them all;
Item: 1742 075 x
Item: 26100.1 017 x
Item: 9319 001 x
Item: 9325 001 x
Item: 5503 001 x
Item: 6717 001 x
Item: 7705 078 x
Item: 7824 072 x
Item: 7839 001 x
Item: 7840 006 x
-------------------------
7840 and others : 253\____ Must be equal. DISM package count = Separate List count of each version in total.
Total Packages : 253 /

78 Package left by 7705 and not replaced by 7840. Now 72x 7824 are placed next to them (7824, 7839 are a part off 7840) Windows Engine contains now 3x the normal size (1742, 7705, 7840) instead of the "normal" size (1742, 7840)
- Component Store Analyzed; 4 packages still remain after an Component Store cleanup. Besides the normal 2 packages of 1742 there now 2 added from 7705 that can't be cleaned up. /StartComponentCleanup on the first attempt it tries and "succeeds" but after a second try (And any further tries) ; It goes to 70% and bails out.

Maybe any other person could verify this. This behavior is very unusual. All what I did extra after 7705 was to remove all AI components inside Windows.

omnescient · Feb 13, 2026

hader said:
/StartComponentCleanup on the first attempt it tries and "succeeds" but after a second try (And any further tries) ; It goes to 70% and bails out.

Maybe any other person could verify this. This behavior is very unusual. All what I did extra after 7705 was to remove all AI components inside Windows.

Yesterday, I had only the usual two 'unclaimable' packages, but the cleanup process was '100%' completed. I just tried it again and got this:
------------------------------------------------------------------------------------------------------
dism /Online /Cleanup-Image /AnalyzeComponentStore
Deployment Image Servicing and Management tool
Version: 10.0.26100.5074
Image Version: 10.0.26200.7840
[==========================100.0%==========================]
Component Store (WinSxS) information:

Windows Explorer Reported Size of Component Store : 12.82 GB
Actual Size of Component Store : 12.31 GB
Shared with Windows : 7.60 GB
Backups and Disabled Features : 4.70 GB
Cache and Temporary Data : 0 bytes
Date of Last Cleanup : 2026-02-11 19:43:56

Number of Reclaimable Packages : 2
Component Store Cleanup Recommended : Yes
The operation completed successfully.
-------------------------------------------------------------------------------------------------------
and then this:
-------------------------------------------------------------------------------------------------------
dism /Online /Cleanup-Image /StartComponentCleanup
Deployment Image Servicing and Management tool
Version: 10.0.26100.5074
Image Version: 10.0.26200.7840

[===========================70.0%======== ]
The operation completed successfully.
-------------------------------------------------------------------------------------------------------
which seems to confirm your result regarding the baling out.

FrankW · Feb 13, 2026

New mail notifications in New Outlook not working after updates.
Both my 2 laptops are running fine, no issues after the KB5077181 update was installed with wuauserv but I use Windows "New Outlook" on my Acer Swift and the Office Outlook version on the Asus: Windows New Outlook loses all Notification features after each Windows update, no sound no popup when new mail arrives while everything possible has been enabled including turning off the energy saver. When I repair Outlook in Add or remove programs, it will work till the next Windows update is installed. After the last repair job, offline notification also does not work any more, this option is enabled in New Outlook and worked OK in January when Outlook is closed (both sound and popup) but no more. Notifications with the Office Outlook version on the Asus works fine and is not affected by Windows updates, This is a bug in New Outlook and I sent a Feedback to MS (also the spell checker in New Outlook Feedback is not working the red underlining for misspelled words shows but no context menu with suggestions). Spell checkers in New Outlook mail and Windows Copilot (not the Edge Sidebar Copilot) work OK.

bo elam · Feb 14, 2026

I updated my W11 yesterday. All seems well, except Storage sense. I read in a couple of posts in this thread about Storage sense not showing Windows.old but no one has mentioned Windows Updates Cleanup Files not appearing when opening Temporary files in Settings. Can someone confirm that this type of files can not be deleted at this time via Settings. Is this a known bug?

My previous Windows update was January, I think I read in a January Preview update thread about this Storage sense issue but I am not sure. I know I read about UAC, I don't use UAC, so, Storage sense opens up normally but I don't see Windows updates cleanup files. Old Disk cleanup tool does show WU files available for cleanup. It only shows about 300MB. Seems little I think. I usually wait for a while before deleting this type of files. If someone can give me some light on this matter, I ll appreciated.

I read this thread a couple of times and no one has mentioned Secure boot, I don't think. My computer has been getting Secure boot updates this month from MS. On Feb 1, I got an update even though Windows updates was paused. And I got another one with this month's WU. If someone wants to know exactly what I got, ask me and I ll post a picture.

Bo

hader · Feb 14, 2026

bo elam said:
I updated my W11 yesterday. All seems well, except Storage sense. I read in a couple of posts in this thread about Storage sense not showing Windows.old but no one has mentioned Windows Updates Cleanup Files not appearing when opening Temporary files in Settings. Can someone confirm that this type of files can not be deleted at this time via Settings. Is this a known bug?

My previous Windows update was January, I think I read in a January Preview update thread about this Storage sense issue but I am not sure. I know I read about UAC, I don't use UAC, so, Storage sense opens up normally but I don't see Windows updates cleanup files. Old Disk cleanup tool does show WU files available for cleanup. It only shows about 300MB. Seems little I think. I usually wait for a while before deleting this type of files. If someone can give me some light on this matter, I ll appreciated.

I read this thread a couple of times and no one has mentioned Secure boot, I don't think. My computer has been getting Secure boot updates this month from MS. On Feb 1, I got an update even though Windows updates was paused. And I got another one with this month's WU. If someone wants to know exactly what I got, ask me and I ll post a picture.

Bo

Normally you would not have the Windows.old directory. This is not caused by any update but by doing an In-Place-Installment or using the Repair My PC function under System Recovery option under Settings. If you haven't done this that Windows.old will be not there.

About secure boot and the needed settings and how to check them; you will not find it here in this thread. This is just all about the latest update. For that subject goto another thread: How to check if your Secure Boot certs are updated. (three methods)

hader · Feb 14, 2026

FrankW said:
New mail notifications in New Outlook not working after updates.
Both my 2 laptops are running fine, no issues after the KB5077181 update was installed with wuauserv but I use Windows "New Outlook" on my Acer Swift and the Office Outlook version on the Asus: Windows New Outlook loses all Notification features after each Windows update, no sound no popup when new mail arrives while everything possible has been enabled including turning off the energy saver. When I repair Outlook in Add or remove programs, it will work till the next Windows update is installed. After the last repair job, offline notification also does not work any more, this option is enabled in New Outlook and worked OK in January when Outlook is closed (both sound and popup) but no more. Notifications with the Office Outlook version on the Asus works fine and is not affected by Windows updates, This is a bug in New Outlook and I sent a Feedback to MS (also the spell checker in New Outlook Feedback is not working the red underlining for misspelled words shows but no context menu with suggestions). Spell checkers in New Outlook mail and Windows Copilot (not the Edge Sidebar Copilot) work OK.

I use Outlook also as a part of office 2021 and 2024. There is a "build in" (WebView2) version of outlook inside Windows also. I don't use that version. With the Outlook as a part off Office 2021/24 I have not seen any problems with it. There should not be one after a Windows update. It targets Windows only (could not find any WebView2 update in this update) But not Office products. They come by a separate means. You have actively press onto the update button inside Office to search for any updates. So I can't imagine that a Windows update will break Outlook. If it was; the whole world would start to complain about Outlook.

There must be an other reason for that. So for you to find out what really happend... Maybe looking inside the logbooks of Windows (There is also an office entry inside there; Microsoft Office Alerts where errors are reported) I find it strange that you have problems after each update. There seems to be an other issue playing in the background here. (I assume you already checked your system with the DISM and SFC commands.)

Option: Take one that often fails. Do a In-Place-Instalment (leaves all your data alone also everything that has to do with outlook) Just start setup of 25H2 or 24H2 while windows is running. (The Windows engine goes back to 26200.6584 if you use 25H2. 26100.1742 if you use 24H2) and update Windows again (back at 26200.7840 (25H2) or 26100.7840 (24H2) and wait and see if these problems disappear. Don't forget to delete Windows.old Inside systemfiles after this using cleanmgr.msc

bo elam · Feb 14, 2026

@hader Hi hader. What I am asking is for someone to confirm whether Storage sense is working properly or not in W11 after installing February's updates. Windows Updates Cleanup files do not appear in my Temporary files in Settings, that is why I am asking.

Bo

fg2001gf11F · Feb 14, 2026

bo elam said:
@hader Hi hader. What I am asking is for someone to confirm whether Storage sense is working properly or not in W11 after installing February's updates. Windows Updates Cleanup files do not appear in my Temporary files in Settings, that is why I am asking.

Bo

No, it is not working properly anymore to delete the previous installation when there is one after a full reinstall.
With latest builds I have to use Disk Cleanup to get rid of the Windows.old when there is one present.
The same problem with the Windows Update Cleanup files.
The problem started after recent updates, but I don't remember exactly when.
I just experienced that case with latest Canary update to 28020.1611 on Feb 12, 2026.

I filed an FBH report.
Edit:
I have the latest MS ISO 26200.7840. I will try and update in place with it and see what happens with this build.

johnpd · Feb 14, 2026

I just updated one of my computers to W11 v25H2 (26200) from 24H2 (26100). When I look at the February updates that are ready to apply, the security update (KB5077181) indicates that is for 26100 instead of 26200. Will this cause a problem?

JohnD

bo elam · Feb 14, 2026

fg2001gf11F said:
No, it is not working properly anymore ...........The same problem with the Windows Update Cleanup files.
The problem started after recent updates, but I don't remember exactly when.

Thanks @fg2001gf11F That is what I wanted to be confirmed. This issue probably started with one of the preview updates that were released in January. I didn't install any of those updates but I know I read about this issue somewhere. After posting earlier today, I ran the legacy Disk cleanup tool ONLY for Windows Updates Cleanup and worked flawlessly. It gave me back about 1.5GB. Thanks, again.

Bo

fg2001gf11F · Feb 14, 2026

bo elam said:
Thanks @fg2001gf11F That is what I wanted to be confirmed. This issue probably started with one of the preview updates that were released in January. I didn't install any of those updates but I know I read about this issue somewhere. After posting earlier today, I ran the legacy Disk cleanup tool ONLY for Windows Updates Cleanup and worked flawlessly. It gave me back about 1.5GB. Thanks, again.

Bo

I just tried an update in place with ISO and this is all it shows on System > Storage > Temporary files.
Second screenshot is Disk Cleanup showing 16.1 GB of Previous Windows Installation.
In this case there is no Windows Update Cleanup file but usually you see that after a Cumulative Update on the top of the Disk Cleanup list.
I don't know if this is an intentional change or just a MS mistake. It is common to all latest Builds, insider and non-insider.

Gone after Running Disk Cleanup.

This shows the usual 2 unreclaimable packages.

AI Component	Version
Image Search	1.2601.1268.0
Content Extraction	1.2601.1268.0
Semantic Analysis	1.2601.1268.0
Settings Model	1.2601.1268.0

Win Update KB5077181 Windows 11 Cumulative Update build 26100.7840 (24H2) and 26200.7840 (25H2) - Feb. 10

February 10, 2026 - KB5077181 (OS Builds 26200.7840 and 26100.7840)​

Announcements and messages​

Windows Secure Boot certificate expiration​

Microsoft Store apps updates​

Change log​

Improvements​

AI Components​

Windows 11 servicing stack update (KB5077869)- 26100.7839​

Known issues in this update​

How to get this update​

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Similar threads

February 10, 2026 - KB5077181 (OS Builds 26200.7840 and 26100.7840)

Announcements and messages

Windows Secure Boot certificate expiration

Microsoft Store apps updates

Change log

Improvements

AI Components

Windows 11 servicing stack update (KB5077869)- 26100.7839

Known issues in this update

How to get this update