2026-01 Security Update (KB5074109) (26200.7623) casuing issues with my PC

Question

2026-01 Security Update (KB5074109) (26200.7623) casuing issues with my PC

Richard Peart 80

My PC has all of the sudden just started to seize up when I turn on my computer in the morning. It will go through a "Diagnosing PC" and "Attempting Repairs" and sometimes even freeze while completing this action. I pressed F2 at start up and ran all of the diagnostics and not showing ANY issues. I started computer again and after it ran through the "diagnosing PC" function, it removed the last update and it now appears my PC is working. How do i prevent future security updates that reek havoc on my machine or what do i need to do to allow this security update to work properly?

Julia Franklin 5 Reputation points

2026-01-15T02:41:24.1033333+00:00

Having exact same issue - restarted 10 times, tried safe mode. No help. Ill try to uninstall the update
Jordan Faciol 10 Reputation points

2026-01-15T18:56:59.7866667+00:00

Having the same issue, I can't even uninstall this goddamn update. FT Microslop
Raynard 20 Reputation points

2026-01-16T02:41:59.62+00:00

After the update, I encountered the following problems: Task Manager seems inaccessible (performance issue), and my laptop stuck during restarts or shutdowns page, forcing me to force a shutdown and after start windows page access the system. then I have to go reset the computer in settings system to recovery find reset this pc just resolve these issues. In short, this version is not compatible with my laptop, and I've disabled the update channel to prevent automatic updates.

However, I tested it on a home computer CPU (not a laptop) and these problems did not occur. Could it be that laptop doesn't support this version or this version have a bug?

laptop model: MSI GE62 6QC Apache
Valerie Nelson 10 Reputation points

2026-01-16T03:21:35.28+00:00

How do uninstall this stupid update? It is hanging there waiting for computer restart, but the restart sequence is preventing my computer from starting at all. I can't uninstall it, as it is not "really" there and I can't finish the install as it will not allow computer to boot up. WTF am I supposed to do with this? I can't just never have to Start my computer again.
Dean Gallea - IEEE 55 Reputation points

2026-01-16T16:25:54.4433333+00:00

I also have an issue with the update. It prevented my PC from full S3 sleep, and required a cold boot to resume. The problem was gone after I uninstalled the update. I will have to block it.
Dean Gallea - IEEE 55 Reputation points

2026-01-16T16:27:11.28+00:00

Do a System Restore, then block updates until this one is fixed.
Grant Emerson 0 Reputation points

2026-01-16T17:01:40.3633333+00:00

Try, Ctrl+Shift+Esc to open Task manager. Click File, Run new task. Type cmd, check box for "Create task with admin privs", click OK. then type: wusa /uninstall /kb:5074109
Jeff Mattero 15 Reputation points

2026-01-16T17:06:19.56+00:00

A few days ago, my computer (Windows 11, version 25H2) installed this Update, and afterwards, my Outlook 2019 kept freezing. I did a system restore to before the update, and Outlook was working fine. Yesterday, my computer automatically downloaded and installed the update again, and again, this morning, Outlook freezes when I open it.
WoozyFoxes 0 Reputation points

2026-01-17T10:31:37.8666667+00:00

same here, makes trying to run steam vr an absolute nightmare
Jeff Mattero 15 Reputation points

2026-01-17T12:01:07.5966667+00:00
Follow-up from my comment above about Outlook 2019 freezing after the update was installed. I followed the directions (#2 below) after uninstalling the update. Direction to uninstall the update are here:

How to uninstall a Windows Update

Select Start > Settings > Windows Update . Under Related settings, select Update history> Uninstall updates - scroll to the bottom of that list under "RELATED SETTINGS" and then click Uninstall Updates, and a list of updates will come up. Click on the one you want to uninstall. Restart the computer.

Then:
"Pause Updates: You can temporarily pause updates in Windows 11. Go to Settings > Windows Update and select Pause updates. This will prevent any new updates from being installed for a set period.

In Windows 10, you can access from Update & Security > Windows Update > View your update history > Uninstall updates
george carlin 5 Reputation points

2026-01-18T12:05:21.1066667+00:00

I literally spent three days fixing this problem and finding who is break s3 sleep mode on the machine.

After uninstalling this update, the issue is GONE.

Issue: When I tried to put the machine to sleep, it just turned off the screen and continued to work, but you can't wake it back up. Sometimes it just reboots after sleeping. Sometimes it was normal. But the smoking gun was that it always goes through BIOS initialization during wake-up.
Allan Kunze 10 Reputation points

2026-01-18T19:19:47.7433333+00:00

I am having the same issue. Outlook locks up and does not show "sent" e-mails. Is there a fix?
Jeff Mattero 15 Reputation points

2026-01-18T19:23:53.95+00:00

Allan Kunze:
See the solution I posted two comments above this one.
Richard Peart 80 Reputation points

2026-01-20T16:12:16.72+00:00

I was able to open in safe mode, run logistics which seemed to give me enough time to then uninstall the update. I also paused all security updates for 3 weeks. My machine is now working as it should work and just hoping hte next security update doesn't cause any issues. Really is very silly and unfortunate that a MS security update completely crashes a computer and requires all of this work to get it back up and functioning. I appreciate everyone responding and providing input as it really did help me figure out what to do. I am not very proficient on a computer and have to really struggle to fix some simple things.
Allan Kunze 10 Reputation points

2026-01-21T21:49:35.17+00:00

I did an uninstall and my computer works fine now. Thanks Jeff.
Marcus Groeber 15 Reputation points

2026-01-22T21:44:52.1933333+00:00
This may or may not be related, but I am just leaving it here as a data point:

My dad's HP Pavilion laptop started freezing multiple times a day last week, and according to the "Reliability" history of Windows, the first issue happened right after the installation of KB5074109 (literally within a minute of the log entry for the update).

Reliability history shows IAStorDataSvc no longer working [note that there was one instance of this on January 8, i.e. before the update]

Also some instances of HamLkd errors

Task Manager hangs when trying to view CPU usage

I have never seen that kind of graph on the Reliability screen (sorry, German):

Curiously, it turned out that the power mode of the PC was set to "High Performance" (not sure if this was already enabled before the security update), and switching this back to "HP Recommended" appears to have improved stability. I only did this an hour ago, so the graph above does not show any effect.

~~Normally I would attribute this to a hardware failure, but the coincidence is weird.~~

Edit: after a few days, it looks like removing the KB5074109 update indeed restored stability.

Another potential symptom (on a different device, 24H2) might be a bluescreen on the lock screen before being able to enter the PIN code.
Nikki Wantenaar 5 Reputation points

2026-01-23T10:41:58.1866667+00:00

Same issue. Windows and Microsoft Outlook have been awful to try and work with since moving to Windows 11. I wish Id never done it. I literally HATE it! Have had endless hangs, non responses, patch problems, wasting hours of time trying to figure out what the heck is going on with my computer. Sin this last patch KB5074109 Outlook has been a total disaster - Non Responsive. Did a repair and then the emails now come through in duplicate the same 112 every day every time I open Outlook. I have now uninstalled KB5074109 update and Outlook now fine. However after start up it start installing it again automatically. I will pause the downloads. However how long will this take to repair?????
Shaynette Cassman 0 Reputation points

2026-01-24T14:00:31.27+00:00

So who do I talk to for paying for me computer. It crashed my driver!
Nikki Wantenaar 5 Reputation points

2026-01-29T14:21:39.2566667+00:00

I can't keep kissing hours and days of work with all these updates and restarts and crashes and patches changing setting and Internet and outlook.... Will be saving up for Apple computer so as not to use Windows and their stupid patches that they don't bother testing. How can one out an official complain in? And where? After saying they have resolved. And having paused so to be able to work... After installing all the last patches. Massive mess on my computer again! Very very frustrated!
Tanya 0 Reputation points

2026-01-29T16:06:29.03+00:00

This update has corrupted my entire computer to the point of no return. My Lenovo Ideapad cant load past my LENOVO logo screen. Microsoft has completely destroyed my laptop and all i can do is pray a recovery thumb drive can bring it back to life otherwise i have to buy a whole new laptop and there was NOTHING WRONG with my laptop prior to the Microsoft destruction! I am so furious!
Lawrence Talbot 0 Reputation points

2026-02-03T03:32:51.4366667+00:00

Do these updates get tested by people, like before release?

Answer accepted by question author

5 additional answers

Your answer

Julia Franklin 5 Reputation points

2026-01-15T02:41:24.1033333+00:00

Having exact same issue - restarted 10 times, tried safe mode. No help. Ill try to uninstall the update
Jordan Faciol 10 Reputation points

2026-01-15T18:56:59.7866667+00:00

Having the same issue, I can't even uninstall this goddamn update. FT Microslop
Raynard 20 Reputation points

2026-01-16T02:41:59.62+00:00

After the update, I encountered the following problems: Task Manager seems inaccessible (performance issue), and my laptop stuck during restarts or shutdowns page, forcing me to force a shutdown and after start windows page access the system. then I have to go reset the computer in settings system to recovery find reset this pc just resolve these issues. In short, this version is not compatible with my laptop, and I've disabled the update channel to prevent automatic updates.

However, I tested it on a home computer CPU (not a laptop) and these problems did not occur. Could it be that laptop doesn't support this version or this version have a bug?

laptop model: MSI GE62 6QC Apache
Valerie Nelson 10 Reputation points

2026-01-16T03:21:35.28+00:00

How do uninstall this stupid update? It is hanging there waiting for computer restart, but the restart sequence is preventing my computer from starting at all. I can't uninstall it, as it is not "really" there and I can't finish the install as it will not allow computer to boot up. WTF am I supposed to do with this? I can't just never have to Start my computer again.
Dean Gallea - IEEE 55 Reputation points

2026-01-16T16:25:54.4433333+00:00

I also have an issue with the update. It prevented my PC from full S3 sleep, and required a cold boot to resume. The problem was gone after I uninstalled the update. I will have to block it.
Dean Gallea - IEEE 55 Reputation points

2026-01-16T16:27:11.28+00:00

Do a System Restore, then block updates until this one is fixed.
Grant Emerson 0 Reputation points

2026-01-16T17:01:40.3633333+00:00

Try, Ctrl+Shift+Esc to open Task manager. Click File, Run new task. Type cmd, check box for "Create task with admin privs", click OK. then type: wusa /uninstall /kb:5074109
Jeff Mattero 15 Reputation points

2026-01-16T17:06:19.56+00:00

A few days ago, my computer (Windows 11, version 25H2) installed this Update, and afterwards, my Outlook 2019 kept freezing. I did a system restore to before the update, and Outlook was working fine. Yesterday, my computer automatically downloaded and installed the update again, and again, this morning, Outlook freezes when I open it.
WoozyFoxes 0 Reputation points

2026-01-17T10:31:37.8666667+00:00

same here, makes trying to run steam vr an absolute nightmare
Jeff Mattero 15 Reputation points

2026-01-17T12:01:07.5966667+00:00

Follow-up from my comment above about Outlook 2019 freezing after the update was installed. I followed the directions (#2 below) after uninstalling the update. Direction to uninstall the update are here:

How to uninstall a Windows Update

Select Start > Settings > Windows Update . Under Related settings, select Update history> Uninstall updates - scroll to the bottom of that list under "RELATED SETTINGS" and then click Uninstall Updates, and a list of updates will come up. Click on the one you want to uninstall. Restart the computer.

Then:
"Pause Updates: You can temporarily pause updates in Windows 11. Go to Settings > Windows Update and select Pause updates. This will prevent any new updates from being installed for a set period.

In Windows 10, you can access from Update & Security > Windows Update > View your update history > Uninstall updates
george carlin 5 Reputation points

2026-01-18T12:05:21.1066667+00:00

I literally spent three days fixing this problem and finding who is break s3 sleep mode on the machine.

After uninstalling this update, the issue is GONE.

Issue: When I tried to put the machine to sleep, it just turned off the screen and continued to work, but you can't wake it back up. Sometimes it just reboots after sleeping. Sometimes it was normal. But the smoking gun was that it always goes through BIOS initialization during wake-up.
Allan Kunze 10 Reputation points

2026-01-18T19:19:47.7433333+00:00

I am having the same issue. Outlook locks up and does not show "sent" e-mails. Is there a fix?
Jeff Mattero 15 Reputation points

2026-01-18T19:23:53.95+00:00

Allan Kunze:
See the solution I posted two comments above this one.
Richard Peart 80 Reputation points

2026-01-20T16:12:16.72+00:00

I was able to open in safe mode, run logistics which seemed to give me enough time to then uninstall the update. I also paused all security updates for 3 weeks. My machine is now working as it should work and just hoping hte next security update doesn't cause any issues. Really is very silly and unfortunate that a MS security update completely crashes a computer and requires all of this work to get it back up and functioning. I appreciate everyone responding and providing input as it really did help me figure out what to do. I am not very proficient on a computer and have to really struggle to fix some simple things.
Allan Kunze 10 Reputation points

2026-01-21T21:49:35.17+00:00

I did an uninstall and my computer works fine now. Thanks Jeff.
Marcus Groeber 15 Reputation points

2026-01-22T21:44:52.1933333+00:00

This may or may not be related, but I am just leaving it here as a data point:

My dad's HP Pavilion laptop started freezing multiple times a day last week, and according to the "Reliability" history of Windows, the first issue happened right after the installation of KB5074109 (literally within a minute of the log entry for the update).

Reliability history shows IAStorDataSvc no longer working [note that there was one instance of this on January 8, i.e. before the update]

Also some instances of HamLkd errors

Task Manager hangs when trying to view CPU usage

I have never seen that kind of graph on the Reliability screen (sorry, German):

Curiously, it turned out that the power mode of the PC was set to "High Performance" (not sure if this was already enabled before the security update), and switching this back to "HP Recommended" appears to have improved stability. I only did this an hour ago, so the graph above does not show any effect.

~~Normally I would attribute this to a hardware failure, but the coincidence is weird.~~

Edit: after a few days, it looks like removing the KB5074109 update indeed restored stability.

Another potential symptom (on a different device, 24H2) might be a bluescreen on the lock screen before being able to enter the PIN code.
Nikki Wantenaar 5 Reputation points

2026-01-23T10:41:58.1866667+00:00

Same issue. Windows and Microsoft Outlook have been awful to try and work with since moving to Windows 11. I wish Id never done it. I literally HATE it! Have had endless hangs, non responses, patch problems, wasting hours of time trying to figure out what the heck is going on with my computer. Sin this last patch KB5074109 Outlook has been a total disaster - Non Responsive. Did a repair and then the emails now come through in duplicate the same 112 every day every time I open Outlook. I have now uninstalled KB5074109 update and Outlook now fine. However after start up it start installing it again automatically. I will pause the downloads. However how long will this take to repair?????
Shaynette Cassman 0 Reputation points

2026-01-24T14:00:31.27+00:00

So who do I talk to for paying for me computer. It crashed my driver!
Nikki Wantenaar 5 Reputation points

2026-01-29T14:21:39.2566667+00:00

I can't keep kissing hours and days of work with all these updates and restarts and crashes and patches changing setting and Internet and outlook.... Will be saving up for Apple computer so as not to use Windows and their stupid patches that they don't bother testing. How can one out an official complain in? And where? After saying they have resolved. And having paused so to be able to work... After installing all the last patches. Massive mess on my computer again! Very very frustrated!
Tanya 0 Reputation points

2026-01-29T16:06:29.03+00:00

This update has corrupted my entire computer to the point of no return. My Lenovo Ideapad cant load past my LENOVO logo screen. Microsoft has completely destroyed my laptop and all i can do is pray a recovery thumb drive can bring it back to life otherwise i have to buy a whole new laptop and there was NOTHING WRONG with my laptop prior to the Microsoft destruction! I am so furious!
Lawrence Talbot 0 Reputation points

2026-02-03T03:32:51.4366667+00:00

Do these updates get tested by people, like before release?

Answer 1

G P 105

Microsoft should be sued for releasing updates like this. Breaking windows explorer preview is a basic necessity of an operating system. It seems like once a month I have to roll back updates, the way they install without permission is disgusting.

Answer 2

John DeV 156.5K Independent Advisor

Hi, good day!

I recommend reporting the issue via Feedback Hub app to notify Microsoft.

https://support.microsoft.com/windows/send-feedback-to-microsoft-with-the-feedback-hub-app-f59187f8-8739-22d6-ba93-f66612949332

Once the KB5074109 update has been uninstalled, please try pausing updates for 1-2 weeks to avoid reinstalling the problematic update.

https://support.microsoft.com/en-us/windows/pause-updates-in-windows-643e9ea7-3cf6-7da6-a25c-95d4f7f099fe

I look forward to receiving your update and I'm willing to collaborate with you till we resolve the issue. Do keep me informed by clicking "Add comment" below.

Tanya 0 Reputation points

2026-01-29T16:08:29.5633333+00:00

How do you do any of this when that update bricked my laptop? I no longer have a functioning computer thanks to this destructive update

Answer 3

Marcus Groeber 15

It looks like there is now an additional OOB update from Microsoft (KB5078127) that is being distributed through Windows Update and that also mentions the Outlook issue:

https://support.microsoft.com/en-us/topic/january-24-2026-kb5078127-os-builds-26200-7628-and-26100-7628-out-of-band-cf5777f6-bb4e-4adb-b9cd-2b64df577491

JoEllen Reed 15 Reputation points

2026-01-26T18:57:25.1933333+00:00

My Classic Outlook is back to working properly with this new update. Thank you.
Jeannine Shaw 0 Reputation points

2026-01-31T18:42:58.3566667+00:00

My OS build is 26200.7623. Will this OOB update work on my computer? I have major issues with Outlook if I install the KB5074109 security update!
JoEllen Reed 15 Reputation points

2026-01-31T21:13:36.4066667+00:00

I had to reinstall KB5074109 first, then install KB5078127 to fix my Outlook. My OS build is 26200.7705.

Answer 4

ychakarov 10

Hello,

There is an out of band update that fixes this bug.

For Windows 11 23H2- https://www.catalog.update.microsoft.com/Search.aspx?q=KB5077797%20

For Windows 11 24H2 and 25H2-- https://www.catalog.update.microsoft.com/Search.aspx?q=KB5077744%20

After you download it you can install it with cmd or powershell:

wusa.exe "C:\Path\To\windows11.0-kb5077797-x64.msu" /quiet /norestart

sigma415 5 Reputation points

2026-01-22T10:12:24.89+00:00

I installed this out of band update KB5077740 for 25H2 but the sleep mode problem was not fixed and was still the same.

After uninstalling also this update sleep mode S3 works again.
Seems that blocking updates is the only solution at the moment. :(
Dean Gallea - IEEE 55 Reputation points

2026-01-22T14:28:20.99+00:00

ychakarov, how are you sure KB5077744fixes the crash-on-sleep bug? Someone else reported it does NOT, and nothing in the Microsoft notes addresses that bug either.
Chris 5 Reputation points

2026-01-25T11:54:32.11+00:00

thanks for this update, outlook classic is working fine again.

Answer 5

Dean Gallea - IEEE 55

FIXED: In my "crash-on-sleep" issue, the incompatible auto-startup app (one of 19 enabled) turned out to be Adobe's "Elements Auto Creations 2025.exe", discovered through an hour of trial and error. I disabled that and sleep/wake works fine now.

Dean Gallea - IEEE 55 Reputation points

2026-01-28T20:16:01.73+00:00

I spoke too soon: After removing the Elements Auto Creations 2025.exe auto-startup, my PC started crashing on sleep (or hibernate) again. Had to back out and block updates again.

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2026-01 Security Update (KB5074109) (26200.7623) casuing issues with my PC

5 additional answers

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