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Microsoft has released new monthly cumulative updates for all supported operating systems. As usual, such updates do not bring any new features with them, but are aimed at fixing bugs and eliminating vulnerabilities. Updates are already available from Windows Update.
You can find detailed information about the changes in updates on the official website by clicking on the links below. Nearby you will find links to manually download update packages from the Microsoft catalog.
Note. Versions 1903 and 1909, as well as 2004, 20H2, 21H1, and 21H2 share a common base operating system version and have an identical set of system files. That is why they receive the same cumulative updates.
I wish you a successful update!