KB5044273 was Microsoft’s October 8, 2024 cumulative security and quality update for Windows 10 version 22H2 and applicable LTSC editions. It brought the regular 22H2 branch to build 19045.5011 and the related LTSC/21H2 branch to 19044.5011. Microsoft’s October Patch Tuesday release addressed 118 vulnerabilities across its product range, including five zero-days; two were reported as actively exploited. Those are Microsoft-wide figures, not a claim that KB5044273 alone fixed 118 Windows 10 vulnerabilities. As of March 31, 2026, Microsoft marks this package expired, so install a current applicable cumulative update rather than seeking KB5044273.
What KB5044273 was
KB5044273 was a monthly cumulative update released on October 8, 2024. It delivered security and quality fixes for Windows 10 version 22H2, including applicable Enterprise LTSC 2021 and IoT Enterprise LTSC 2021 systems. It was not a feature release. As a cumulative update, it incorporated earlier cumulative fixes as well as that month’s applicable changes.
| Servicing branch | Build after KB5044273 | Applicability |
|---|---|---|
| Windows 10 22H2 | 19045.5011 | Applicable Home, Pro, Enterprise, and Education editions |
| Windows 10 LTSC 2021 / related 21H2 branch | 19044.5011 | Applicable Enterprise LTSC 2021 and IoT Enterprise LTSC 2021 editions |
Edition and servicing-branch applicability matter: Windows Server, other Windows 10 releases, and separate .NET Framework updates are not the same package. Microsoft’s KB5044273 support article records the release details and builds.
What the “118 flaws and five zero-days” figures mean
Microsoft’s October 2024 security release addressed 118 vulnerabilities across Microsoft products, including Windows, Office, and other products. KB5044273 carried the fixes applicable to its Windows 10 branches; it did not contain every fix in the broader release. The Microsoft Security Response Center’s October update overview and CERT-EU’s advisory describe the wider release.
Recommended Free Tools
#1 Best Overall
- Fresh USB Install With Key code Included
- 24/7 Tech Support from expert Technician
- Top product with Great Reviews
“Zero-day” does not mean that every vulnerability was being exploited. In this October release, two were reported as actively exploited; three others had been publicly disclosed before a fix was available. The term describes the disclosure or exploitation context, not a uniform attack method or risk level. The five vulnerabilities highlighted in reporting were:
| CVE | Component and reported impact | Status in October reporting |
|---|---|---|
| CVE-2024-43573 | Windows MSHTML Platform spoofing; could mislead a user about a file or warning | Actively exploited; publicly disclosed |
| CVE-2024-43572 | Microsoft Management Console remote-code execution; a malicious saved console file was the described attack route | Actively exploited; publicly disclosed |
| CVE-2024-43583 | Winlogon elevation of privilege; could allow escalation, including to SYSTEM in the relevant affected environment | Publicly disclosed |
| CVE-2024-43584 | Windows-related elevation-of-privilege vulnerability | Publicly disclosed; consult Microsoft’s Security Update Guide for exact affected products and applicability |
| CVE-2024-6197 | libcurl remote-code execution involving vulnerable curl/libcurl use when connecting to a malicious server | Publicly disclosed; applicability depends on affected software and context |
The classifications and product scope are not interchangeable with a claim that all five were exploitable through an ordinary Windows 10 desktop, or that each was fixed solely by this one KB. The Microsoft Security Update Guide is the place to check a CVE against a particular product and version. CERT-EU discusses several of the highlighted vulnerabilities, while the NVD entry for CVE-2024-43573 provides additional vulnerability details.
Why the vulnerabilities mattered
- Spoofing: An attacker may try to make a user misread a file’s type, origin, or security warning. That is different from code executing automatically on every vulnerable PC.
- Remote code execution: The MMC issue involved a specially crafted console file. RCE describes the potential to run attacker-controlled code under the stated conditions; it does not by itself mean every machine was reachable over the internet.
- Elevation of privilege: A local privilege-escalation flaw generally matters after an attacker has already gained some foothold. It can increase what that attacker can do, but is not equivalent to an internet-facing, wormable RCE.
- libcurl: The risk depends on software incorporating the vulnerable curl/libcurl functionality and using it in a susceptible way, such as connecting to a malicious server.
Active exploitation raises urgency, but it does not mean every Windows 10 user was targeted or compromised. Severity scores and labels also do not predict how often a particular attack will occur.
How to check whether the update or a later one is installed
A later cumulative build normally supersedes KB5044273, so a build number higher than the October 2024 target is generally evidence that the system has moved on. Check the branch as well as the number: ordinary Windows 10 22H2 targets 19045.5011, while the applicable LTSC/21H2 branch targets 19044.5011.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
- Check the build: Press Windows + R, enter
winver, and press Enter. Alternatively, open Settings → System → About and read the Windows specifications. - Check update history: Open Settings → Update & Security → Windows Update → View update history. Under Quality Updates, look for an entry similar to “2024-10 Cumulative Update for Windows 10 Version 22H2 … (KB5044273).” The label varies by architecture and edition.
- Use PowerShell if needed: Run
Get-ComputerInfo | Select-Object WindowsProductName, WindowsVersion, OsBuildNumberto display product, version, and build information.
How to install it—and what to do now
When it was current, the standard consumer route was Settings → Update & Security → Windows Update → Check for updates, followed by installation of the applicable cumulative update and a restart if prompted. Windows Update for Business, WSUS, Configuration Manager, and Intune policies can control timing on managed devices. Microsoft originally distributed the package through its update services and the Update Catalog.
Rank #2
- Comprehensive Solution: This Windows 10 reinstall DVD provides a complete solution for resolving various system issues, including crashes, malware infections, boot failures, and performance slowdowns. Repair, Recover, Restore, and Reinstall any version of Windows.
- USB will work on any type of computer (make or model). Creates a new copy of Windows! DOES NOT INCLUDE product key.
- Windows not starting up? NT Loader missing? Repair Windows Boot Manager (BOOTMGR), NTLDR, and so much more with this DVD. Clean Installation: Allows you to perform a fresh installation of Windows 11 64-bit, effectively wiping the system and starting from a clean slate.
- Step by Step instructions on how to fix Windows 10 issues. Whether it be broken, viruses, running slow, or corrupted our disc will serve you well
- Please remember that this DVD does not come with a KEY CODE. You will need to obtain a Windows Key Code in order to use the reinstall option
That is historical guidance now: Microsoft marked the KB5044273 support article expired and removed the package from its release channels as of March 31, 2026. Do not spend time hunting for this old installer. Use Windows Update or your organization’s approved deployment system to install the latest applicable cumulative update for the device’s edition and servicing branch. Microsoft’s Windows release information provides build-history context.
The separate .NET Framework update is also not KB5044273. Microsoft published .NET packages separately; see the applicable October .NET Framework update information for that package.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.If Windows Update fails
These are general Windows servicing steps, not a Microsoft-confirmed KB5044273-specific workaround. For a current update that will not install, proceed in order:
The Tool Desk
Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →- Restart the PC and retry Windows Update.
- Disconnect nonessential USB devices and check that the system has sufficient free disk space.
- Run the Windows Update troubleshooter.
- Open an elevated Command Prompt and run
DISM /Online /Cleanup-Image /RestoreHealth. When it completes, runsfc /scannow, restart, and retry the update. - Review Event Viewer → Applications and Services Logs → Microsoft → Windows → WindowsUpdateClient for installation errors. On a managed device, also check the relevant WSUS, Configuration Manager, or Intune deployment logs.
- Only temporarily disable or remove third-party antivirus if your established IT policy permits it; do not leave the system without protection.
- If a current update causes a serious regression, use Settings → Update & Security → Windows Update → View update history → Uninstall updates where supported, then follow Microsoft or your administrator’s remediation guidance and deploy a superseding update when appropriate.
Deployment priorities for organizations
When the update was current, a risk-based rollout made sense. Internet-connected endpoints and high-value administrative workstations warranted priority because two vulnerabilities were reported as actively exploited and privilege-escalation or management-console attacks can have significant consequences. Isolated systems still needed a tested patch plan; isolation reduced exposure but was not a reason to abandon maintenance.
Organizations with legacy applications could pilot updates against representative workloads, especially where software depended on management consoles, authentication, shell integrations, endpoint security, or custom drivers. Windows 10 releases, LTSC editions, architectures, and Windows Server have distinct applicability and servicing paths; verify the exact product rather than assuming the same KB applies everywhere. For a device still on an unsupported Windows 10 installation, the larger issue is its operating-system support lifecycle and the need for an upgrade or an applicable extended-support arrangement.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
