December 8, 2020—KB4592449 (OS Builds 18362.1256 and 18363.1256) - EXPIRED

^{NEW 8/5/21}
EXPIRATION NOTICE

IMPORTANT As of 8/5/2021, this KB is no longer available from Windows Update, the Microsoft Update Catalog, or other release channels.  We recommend that you update your devices to the latest security quality update. 

^{NEW 12/8/20}
IMPORTANT Adobe Flash Player will go out of support on December 31, 2020. For more information, see Adobe Flash end of support on December 31, 2020. Flash content will be blocked from running in Flash Player beginning January 12, 2021. For more information, see Adobe Flash Player EOL General Information Page.

^{UPDATED 12/8/20}
REMINDER Windows 10, version 1903 has reached end of servicing as of this release dated December 8, 2020. To continue receiving security and quality updates, Microsoft recommends that you update to the latest version of Windows 10. If you want to update to Windows 10, version 1909, you must use the Enablement Package KB4517245(EKB). Using the EKB makes updating faster and easier and requires a single restart. For more information, see Windows 10, version 1909 delivery options.

^11/19/20
For information about Windows update terminology, see the article about the types of Windows updates and the monthly quality update types. To view other notes and messages, see the Windows 10, version 1903 update history home page.

Note Follow @WindowsUpdate to find out when new content is published to the release information dashboard.

^11/10/20
IMPORTANT Because of minimal operations during the holidays and the upcoming Western new year, there won’t be a preview release (known as a “C” release) for the month of December 2020. Normal monthly servicing for both B and C releases will resume in January 2021.