End of support information
Note
Windows 8.1 reached end of support (EOS) on January 10, 2023, at which point technical assistance and software updates are no longer provided. If you have devices running Windows 8.1, we recommend upgrading them to a more current, in-service, and supported Windows release. If devices do not meet the technical requirements to run a more current release of Windows, we recommend that you replace the device with one that supports Windows 11.
Microsoft will not be offering an Extended Security Update (ESU) program for Windows 8.1. Continuing to use Windows 8.1 after January 10, 2023 may increase an organization’s exposure to security risks or impact its ability to meet compliance obligations. For more information, see Windows 8.1 support will end on January 10, 2023.
We recommend upgrading to a later version of Windows. For more information, see Upgrade to a later version of Windows.
Windows Server 2012 R2 reached end of support (EOS) on October 10, 2023. Extended Security Updates (ESUs) are available for purchase and will continue for three years, renewable on an annual basis, until the final date on October 13, 2026. For more information, see Windows Server End of Support: Key Dates. For information about the procedure to continue receiving security updates, see KB5031043.
We recommend upgrading to a later version of Windows Server. For more information, see Learn about upgrading Windows Server.
Windows Embedded 8.1 Industry Enterprise and Windows Embedded 8.1 Industry Pro reached end of support (EOS) on July 11, 2023. Therefore, technical assistance and software updates are no longer provided.
Summary
This update makes quality improvements to the servicing stack, which is the component that installs Windows updates. Servicing stack updates (SSU) makes sure that you have a robust and reliable servicing stack so that your devices can receive and install Microsoft updates.
How to get this update
Install this update
To install this update, use one of the following release channels.
| Available | Next step |
|---|---|
| Yes | This update is available through Windows Update. It will be downloaded and installed automatically. |
| Prerequisites | There are no prerequisites to apply this update. |
|---|---|
| Restart information | You do not have to restart your computer after you apply this update. |
| Removal information | Servicing stack updates (SSUs) make changes to how updates are installed and cannot be uninstalled from the device. |
| Update replacement information | This update replaces the previously released update KB5041588. |
File Information
The English (United States) version of this software update installs files that have the following attributes. This update might contain files for additional languages.
For all supported x64-based versions
| File name | File version | Date | Time | File size |
|---|---|---|---|---|
| httpai.dll | 6.3.9600.22175 | 29-Aug-24 | 17:46 | 57,856 |
| peerdistai.dll | 6.3.9600.22175 | 29-Aug-24 | 17:46 | 72,192 |
| PrintAdvancedInstaller.dll | 6.3.9600.22175 | 29-Aug-24 | 17:59 | 102,400 |
| msdtcadvancedinstaller.dll | 6.3.9600.22175 | 29-Aug-24 | 17:45 | 257,536 |
| netfxconfig.dll | 6.3.9600.22175 | 29-Aug-24 | 18:15 | 34,816 |
| ConfigureIEOptionalComponentsAI.dll | 6.3.9600.22175 | 29-Aug-24 | 17:45 | 84,992 |
| IEFileInstallAI.dll | 6.3.9600.22175 | 29-Aug-24 | 17:42 | 68,096 |
| servicemodelregai.dll | 6.3.9600.22175 | 29-Aug-24 | 17:45 | 115,200 |
| SetIEInstalledDateAI.dll | 6.3.9600.22175 | 29-Aug-24 | 17:46 | 51,712 |
| ceipfwdai.dll | 6.3.9600.22175 | 29-Aug-24 | 17:42 | 228,352 |
| bcdeditai.dll | 6.3.9600.22175 | 29-Aug-24 | 17:47 | 287,232 |
| appxreg.dll | 6.3.9600.22175 | 29-Aug-24 | 18:09 | 14,848 |
| RegisterIEPKeysAI.dll | 6.3.9600.22175 | 29-Aug-24 | 17:44 | 19,968 |
| cmipnpinstall.dll | 6.3.9600.22175 | 29-Aug-24 | 18:14 | 248,832 |
| appserverai.dll | 6.3.9600.22175 | 29-Aug-24 | 18:12 | 146,432 |
| RDWebAI.dll | 6.3.9600.22175 | 29-Aug-24 | 17:57 | 140,800 |
| tssdisai.dll | 6.3.9600.22175 | 29-Aug-24 | 17:55 | 156,160 |
| VmHostAI.dll | 6.3.9600.22175 | 29-Aug-24 | 18:00 | 123,392 |
| securebootai.dll | 6.3.9600.22175 | 29-Aug-24 | 17:47 | 163,328 |
| winsockai.dll | 6.3.9600.22175 | 29-Aug-24 | 17:45 | 69,632 |
| ws2_helper.dll | 6.3.9600.22175 | 29-Aug-24 | 17:46 | 62,976 |
| cleanupai.dll | 6.3.9600.22175 | 29-Aug-24 | 17:46 | 33,792 |
| wdscore.dll | 6.3.9600.22175 | 29-Aug-24 | 17:46 | 276,480 |
| CntrtextInstaller.dll | 6.3.9600.22175 | 29-Aug-24 | 17:48 | 153,088 |
| drvstore.dll | 6.3.9600.22175 | 29-Aug-24 | 17:48 | 744,960 |
| dpx.dll | 6.3.9600.22175 | 29-Aug-24 | 17:41 | 345,088 |
| msdelta.dll | 6.3.9600.22175 | 29-Aug-24 | 17:47 | 499,712 |
| mspatcha.dll | 6.3.9600.22175 | 29-Aug-24 | 17:49 | 46,080 |
| cmiv2.dll | 6.3.9600.22175 | 29-Aug-24 | 18:15 | 3,300,352 |
| cmiaisupport.dll | 6.3.9600.22175 | 29-Aug-24 | 17:44 | 3,154,944 |
| cmitrust.dll | 6.3.9600.22175 | 29-Aug-24 | 17:46 | 418,304 |
| WcmTypes.xsd | Not versioned | 29-Aug-24 | 15:27 | 1,047 |
| CbsMsg.dll | 6.3.9600.22175 | 29-Aug-24 | 17:49 | 42,496 |
| CbsCore.dll | 6.3.9600.22175 | 29-Aug-24 | 17:42 | 1,609,728 |
| TiWorker.exe | 6.3.9600.22175 | 29-Aug-24 | 17:46 | 193,024 |
| TiFileFetcher.exe | 6.3.9600.22175 | 29-Aug-24 | 17:42 | 427,520 |
| DrUpdate.dll | 6.3.9600.22175 | 29-Aug-24 | 17:48 | 246,784 |
| wrpint.dll | 6.3.9600.22175 | 29-Aug-24 | 17:42 | 66,048 |
| wcp.dll | 6.3.9600.22175 | 29-Aug-24 | 17:48 | 2,855,424 |
| cmiadapter.dll | 6.3.9600.22175 | 29-Aug-24 | 17:45 | 139,264 |
| smiengine.dll | 6.3.9600.22175 | 29-Aug-24 | 17:37 | 922,624 |
| smipi.dll | 6.3.9600.22175 | 29-Aug-24 | 17:46 | 65,536 |
| poqexec.exe | 6.3.9600.22175 | 29-Aug-24 | 18:28 | 146,432 |
| amd64_installed | Not versioned | 29-Aug-24 | 15:24 | 9 |
| bfsvc.dll | 6.3.9600.22175 | 29-Aug-24 | 17:43 | 86,016 |
| timezoneai.dll | 6.3.9600.22175 | 29-Aug-24 | 17:47 | 101,888 |
| GlobalInstallOrder.xml | Not versioned | 29-Aug-24 | 15:27 | 1,249,919 |
| luainstall.dll | 6.3.9600.22175 | 29-Aug-24 | 17:46 | 53,248 |
| fveupdateai.dll | 6.3.9600.22175 | 29-Aug-24 | 17:45 | 61,952 |
| ExtendedSecurityUpdatesAI.dll | 6.3.9600.22175 | 29-Aug-24 | 18:12 | 214,528 |
| mofinstall.dll | 6.3.9600.22175 | 29-Aug-24 | 17:46 | 67,072 |
| esscli.dll | 6.3.9600.22175 | 29-Aug-24 | 17:45 | 388,608 |
| mofd.dll | 6.3.9600.22175 | 29-Aug-24 | 17:45 | 248,320 |
| repdrvfs.dll | 6.3.9600.22175 | 29-Aug-24 | 17:45 | 350,720 |
| fastprox.dll | 6.3.9600.22175 | 29-Aug-24 | 17:45 | 854,016 |
| wbemcomn.dll | 6.3.9600.22175 | 29-Aug-24 | 17:46 | 453,632 |
| wbemcore.dll | 6.3.9600.22175 | 29-Aug-24 | 17:44 | 1,148,928 |
| wmiutils.dll | 6.3.9600.22175 | 29-Aug-24 | 17:46 | 111,104 |
| wbemprox.dll | 6.3.9600.22175 | 29-Aug-24 | 17:46 | 35,840 |
| wmicmiplugin.dll | 6.3.9600.22175 | 29-Aug-24 | 17:42 | 508,928 |
| sppinst.dll | 6.3.9600.22175 | 29-Aug-24 | 17:41 | 769,024 |
| cmifw.dll | 6.3.9600.22175 | 29-Aug-24 | 17:44 | 97,280 |
| FirewallOfflineAPI.dll | 6.3.9600.22175 | 29-Aug-24 | 17:48 | 166,912 |
| NetSetupAI.dll | 6.3.9600.22175 | 29-Aug-24 | 17:47 | 65,024 |
| NetSetupApi.dll | 6.3.9600.22175 | 29-Aug-24 | 17:48 | 184,832 |
| httpai.dll | 6.3.9600.22175 | 29-Aug-24 | 17:41 | 55,296 |
| peerdistai.dll | 6.3.9600.22175 | 29-Aug-24 | 17:41 | 65,024 |
| PrintAdvancedInstaller.dll | 6.3.9600.22175 | 29-Aug-24 | 17:50 | 99,328 |
| msdtcadvancedinstaller.dll | 6.3.9600.22175 | 29-Aug-24 | 17:40 | 215,040 |
| netfxconfig.dll | 6.3.9600.22175 | 29-Aug-24 | 18:02 | 40,448 |
| ConfigureIEOptionalComponentsAI.dll | 6.3.9600.22175 | 29-Aug-24 | 17:40 | 76,800 |
| IEFileInstallAI.dll | 6.3.9600.22175 | 29-Aug-24 | 17:38 | 66,560 |
| servicemodelregai.dll | 6.3.9600.22175 | 29-Aug-24 | 17:40 | 96,768 |
| SetIEInstalledDateAI.dll | 6.3.9600.22175 | 29-Aug-24 | 17:41 | 49,152 |
| ceipfwdai.dll | 6.3.9600.22175 | 29-Aug-24 | 17:38 | 197,632 |
| bcdeditai.dll | 6.3.9600.22175 | 29-Aug-24 | 17:42 | 271,360 |
| appxreg.dll | 6.3.9600.22175 | 29-Aug-24 | 17:57 | 19,968 |
| RegisterIEPKeysAI.dll | 6.3.9600.22175 | 29-Aug-24 | 17:39 | 23,040 |
| cmipnpinstall.dll | 6.3.9600.22175 | 29-Aug-24 | 18:00 | 195,072 |
| securebootai.dll | 6.3.9600.22175 | 29-Aug-24 | 17:41 | 147,456 |
| winsockai.dll | 6.3.9600.22175 | 29-Aug-24 | 17:40 | 71,680 |
| ws2_helper.dll | 6.3.9600.22175 | 29-Aug-24 | 17:41 | 50,176 |
| cleanupai.dll | 6.3.9600.22175 | 29-Aug-24 | 17:41 | 37,376 |
| wdscore.dll | 6.3.9600.22175 | 29-Aug-24 | 17:41 | 208,384 |
| CntrtextInstaller.dll | 6.3.9600.22175 | 29-Aug-24 | 17:43 | 128,000 |
| drvstore.dll | 6.3.9600.22175 | 29-Aug-24 | 17:43 | 610,304 |
| dpx.dll | 6.3.9600.22175 | 29-Aug-24 | 17:38 | 265,216 |
| msdelta.dll | 6.3.9600.22175 | 29-Aug-24 | 17:41 | 398,336 |
| mspatcha.dll | 6.3.9600.22175 | 29-Aug-24 | 17:43 | 36,864 |
| cmiv2.dll | 6.3.9600.22175 | 29-Aug-24 | 18:02 | 2,257,408 |
| cmiaisupport.dll | 6.3.9600.22175 | 29-Aug-24 | 17:39 | 2,162,688 |
| cmitrust.dll | 6.3.9600.22175 | 29-Aug-24 | 17:41 | 286,720 |
| CbsMsg.dll | 6.3.9600.22175 | 29-Aug-24 | 17:43 | 41,984 |
| CbsCore.dll | 6.3.9600.22175 | 29-Aug-24 | 17:38 | 1,381,888 |
| TiWorker.exe | 6.3.9600.22175 | 29-Aug-24 | 17:41 | 190,464 |
| TiFileFetcher.exe | 6.3.9600.22175 | 29-Aug-24 | 17:39 | 355,328 |
| DrUpdate.dll | 6.3.9600.22175 | 29-Aug-24 | 17:42 | 202,240 |
| wrpint.dll | 6.3.9600.22175 | 29-Aug-24 | 17:38 | 56,320 |
| wcp.dll | 6.3.9600.22175 | 29-Aug-24 | 17:43 | 2,409,472 |
| cmiadapter.dll | 6.3.9600.22175 | 29-Aug-24 | 17:40 | 121,856 |
| smiengine.dll | 6.3.9600.22175 | 29-Aug-24 | 17:35 | 750,080 |
| smipi.dll | 6.3.9600.22175 | 29-Aug-24 | 17:41 | 59,904 |
| poqexec.exe | 6.3.9600.22175 | 29-Aug-24 | 18:12 | 129,536 |
| x86_installed | Not versioned | 29-Aug-24 | 15:24 | 9 |
| bfsvc.dll | 6.3.9600.22175 | 29-Aug-24 | 17:39 | 82,432 |
| timezoneai.dll | 6.3.9600.22175 | 29-Aug-24 | 17:42 | 86,528 |
| luainstall.dll | 6.3.9600.22175 | 29-Aug-24 | 17:41 | 43,008 |
| fveupdateai.dll | 6.3.9600.22175 | 29-Aug-24 | 17:40 | 57,344 |
| ExtendedSecurityUpdatesAI.dll | 6.3.9600.22175 | 29-Aug-24 | 17:59 | 177,152 |
| mofinstall.dll | 6.3.9600.22175 | 29-Aug-24 | 17:41 | 64,000 |
| esscli.dll | 6.3.9600.22175 | 29-Aug-24 | 17:41 | 293,376 |
| mofd.dll | 6.3.9600.22175 | 29-Aug-24 | 17:40 | 204,800 |
| repdrvfs.dll | 6.3.9600.22175 | 29-Aug-24 | 17:40 | 277,504 |
| fastprox.dll | 6.3.9600.22175 | 29-Aug-24 | 17:40 | 670,208 |
| wbemcomn.dll | 6.3.9600.22175 | 29-Aug-24 | 17:41 | 386,048 |
| wbemcore.dll | 6.3.9600.22175 | 29-Aug-24 | 17:40 | 925,696 |
| wmiutils.dll | 6.3.9600.22175 | 29-Aug-24 | 17:41 | 90,624 |
| wbemprox.dll | 6.3.9600.22175 | 29-Aug-24 | 17:41 | 29,696 |
| wmicmiplugin.dll | 6.3.9600.22175 | 29-Aug-24 | 17:38 | 392,704 |
| sppinst.dll | 6.3.9600.22175 | 29-Aug-24 | 17:38 | 646,656 |
| cmifw.dll | 6.3.9600.22175 | 29-Aug-24 | 17:40 | 80,896 |
| FirewallOfflineAPI.dll | 6.3.9600.22175 | 29-Aug-24 | 17:42 | 140,800 |
| NetSetupAI.dll | 6.3.9600.22175 | 29-Aug-24 | 17:42 | 55,296 |
| NetSetupApi.dll | 6.3.9600.22175 | 29-Aug-24 | 17:42 | 124,928 |