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The Update Bureau

Windows 10

Windows 10 updates

All published releases for Windows 10, newest first: what each update changes, whether to install it and any confirmed known issues. Latest release: November 13, 2026.

14 active known issues →

Windows 10 updates

  • Windows 10 21H2 / 22H2 Windows 10 21H2 / 22H2 Security update
    Zero-day

    KB5034763

    Closes exploited kernel, SmartScreen and shortcut-file flaws

    Closes three exploited security flaws, including one in the Windows kernel, and addresses several Windows 10 issues. It is no longer available; Microsoft recommends updating to the latest Windows version.

    As of March 31, 2026, this update is no longer available from Microsoft Update Catalog or other release channels. Microsoft recommends updating devices to the latest Windows version.
    Known issues: 2 open
    • Windows devices using more than one (1) monitor might experience issues with desktop icons moving unexpectedly between monitors or other icon alignment issues when attempting to use Copilot in Window…
    • Copilot in Windows (in preview) is not currently supported when your taskbar is located vertically on the right or left of your screen.

    Key changes 38 CVEs · 6 changes

    • Improved Windows 10, version 22H2: Version 22H2 includes the improvements listed for supported Windows 10, version 21H2 editions.
    • Improved Device metadata: Downloads of device metadata from WMIS over HTTPS are more secure.
    • Improved Servicing stack: The component that installs Windows updates receives quality improvements.

    Read update Source: Microsoft

    Builds
    19044.4046 · 19045.4046
    Security
    38 fixed · 1 critical · 3 exploited
  • Windows 10 1809 Windows 10 1809 Security update Also for Windows Server
    Zero-day

    KB5034768

    Exploited kernel, SmartScreen and shortcut flaws addressed

    The update addresses 38 vulnerabilities, including three exploited flaws in the Windows kernel, SmartScreen and internet shortcut files, plus one critical flaw in Windows PGM.

    As of March 31, 2026, this update is no longer available from Microsoft Update Catalog or other release channels. Microsoft recommends updating devices to the latest Windows version.

    Key changes 38 CVEs · 9 changes

    • Improved Windows nesting limit: The Windows nesting limit can now be set as low as 35 instead of 50.
    • Improved UEFI Secure Boot: UEFI Secure Boot systems can opt to add a renewed signing certificate.
    • Improved Windows Kernel Vulnerable Driver Blocklist: The vulnerable driver blocklist gets its quarterly update, adding drivers at risk of being used in BYOVD attacks.

    Read update Source: Microsoft

    Build
    17763.5458
    Security
    38 fixed · 1 critical · 3 exploited
  • Windows 10 1607 Windows 10 1607 Security update Also for Windows Server
    Zero-day

    KB5034767

    Exploited SmartScreen bypass patched; Secure Boot certificate added

    The update fixes 33 vulnerabilities, including an actively exploited SmartScreen bypass (CVE-2024-21351) and a critical remote-code-execution flaw (CVE-2024-21357). It also adds an optional Secure Boot certificate and secures HTTPS device-metadata downloads.

    As of March 31, 2026, this update is no longer available from the Microsoft Update Catalog or other release channels. Microsoft recommends updating devices to the latest version of Windows.

    Key changes 33 CVEs · 2 changes

    • Improved UEFI Secure Boot: Systems using UEFI Secure Boot can opt to add a renewed signing certificate to the Secure Boot database.
    • Fix Device metadata: Downloads of device metadata over HTTPS are more secure.
    • Exploited CVE-2024-21351: Windows SmartScreen Security Feature Bypass Vulnerability

    Read update Source: Microsoft

    Build
    14393.6709
    Security
    33 fixed · 1 critical · 1 exploited
  • Windows 10 22H2 Windows 10 22H2 Optional preview
    Preview

    KB5034203

    Printer setup issue addressed; richer weather comes to the lock screen

    Addresses an issue that could make some single-function printers install as scanners and begins rolling out interactive weather on the lock screen.

    Check the newer update, KB5034843
    Known issues: 2 open
    • Windows devices using more than one (1) monitor might experience issues with desktop icons moving unexpectedly between monitors or other icon alignment issues when attempting to use Copilot in Window…
    • Copilot in Windows (in preview) is not currently supported when your taskbar is located vertically on the right or left of your screen.

    Key changes 20 changes

    • New Lock screen: A richer, interactive weather experience is coming to the lock screen over the coming weeks. Hovering over the weather shows more infor...
    • Improved Digital Markets Act compliance: Changes to support Digital Markets Act compliance roll out gradually to Windows 10, version 22H2 PCs in the European Economic Area.
    • Improved Windows Kernel Vulnerable Driver Blocklist: The vulnerable driver blocklist gains entries for drivers at risk of BYOVD attacks.

    Read update Source: Microsoft

    Build
    19045.3996
    Restart
    Required
  • Windows 10 21H2 / 22H2 Windows 10 21H2 / 22H2 Security update

    KB5034122

    Critical Kerberos and Hyper-V flaws patched; Copilot issues remain

    The update fixes 34 vulnerabilities, including critical flaws in Kerberos and Hyper-V. It is no longer available through Microsoft release channels as of March 31, 2026.

    As of March 31, 2026, this update is no longer available through the Microsoft Update Catalog or other release channels. Microsoft recommends updating devices to the latest version of Windows.
    Known issues: 2 open
    • Windows devices using more than one (1) monitor might experience issues with desktop icons moving unexpectedly between monitors or other icon alignment issues when attempting to use Copilot in Window…
    • Copilot in Windows (in preview) is not currently supported when your taskbar is located vertically on the right or left of your screen.

    Key changes 34 CVEs · 5 changes

    • Improved Windows 10, version 22H2: This build includes all the improvements from supported Windows 10 version 21H2 editions.
    • Improved Servicing stack: The component that installs Windows updates receives quality improvements to help devices receive and install Microsoft updates reliabl...
    • Fix ActiveX scroll bar: The ActiveX scroll bar works in IE mode again.

    Read update Source: Microsoft

    Builds
    19044.3930 · 19045.3930
    Security
    34 fixed · 2 critical
  • Windows 10 1809 Windows 10 1809 Security update Also for Windows Server

    KB5034127

    IE mode hangs and multi-monitor touch input issues addressed

    Addresses problems that can make IE mode stop responding and touchscreens work improperly with multiple monitors. As of March 31, 2026, it is no longer available through Microsoft release channels.

    As of March 31, 2026, this update is no longer available from the Microsoft Update Catalog or other release channels. Microsoft recommends updating devices to the latest version of Windows.

    Key changes 32 CVEs · 13 changes

    • Improved Servicing stack: The component that installs Windows updates receives quality improvements to help devices receive and install Microsoft updates.
    • Fix IE mode: IE mode can stop responding when you press the left arrow key in an empty text box. This update addresses the issue when caret browsing...
    • Fix Touchscreens: This update addresses touchscreen problems that occur when you use more than one monitor.

    Read update Source: Microsoft

    Build
    17763.5329
    Security
    32 fixed · 2 critical
  • Windows 10 1607 Windows 10 1607 Security update Also for Windows Server

    KB5034119

    Critical Kerberos bypass risk and IE mode scroll bar addressed

    Addresses 24 vulnerabilities, including the critical Kerberos security feature bypass CVE-2024-20674, and an ActiveX scroll bar issue in IE mode. It is no longer available from Microsoft as of March 31, 2026.

    As of March 31, 2026, this update is no longer available from Microsoft Update Catalog or other release channels. Microsoft recommends updating devices to the latest version of Windows.

    Key changes 24 CVEs · 1 change

    • Fix ActiveX scroll bar: Addresses a problem that prevents the ActiveX scroll bar from working in IE mode.
    • Critical CVE-2024-20674: Windows Kerberos Security Feature Bypass Vulnerability
    • CVSS 8.1 CVE-2024-20652: Windows HTML Platforms Security Feature Bypass Vulnerability

    Read update Source: Microsoft

    Build
    14393.6614
    Security
    24 fixed · 1 critical