[Windows 10, 8, 7, XP etc.] indospot:
Hey everyone. This thread lists the latest cumulative updates available for each version of Windows 10 as of July 8, 2021. While some versions are still getting monthly updates, others are no longer supported. We've included links for the last available updates for each version, including unsupported ones.

Windows 10 version	Build number	Changelog (KB)	Download	Latest release	Supported editions
21H1	19043.1083	KB5004945	Update Catalog	July 6, 2021	All editions
20H2	19042.1083	KB5004945	Update Catalog	July 6, 2021	All editions
2004	19041.1083	KB5004945	Update Catalog	July 6, 2021	All editions
1909	18363.1646	KB5004946	Update Catalog	July 6, 2021	Enterprise, Education
1903	18362.1256	KB4592449	Update Catalog	December 8, 2020	Not supported
1809	17763.2029	KB5004947	Update Catalog	July 6, 2021	Long-Term Servicing Channel
1803	17134.2208	KB5003174	Update Catalog	May 11, 2021	Not supported
1709	16299.2166	KB4580328	Update Catalog	October 13, 2020	Not supported
1703	15063.2108	KB4520010	Update Catalog	October 8, 2019	Not supported
1607	14393.4470	KB5004948	Update Catalog	July 7, 2021	Long-Term Servicing Branch
1511	10586.1540	KB4093109	Update Catalog	April 10, 2018	Not supported
1507	10240.18969	KB5004950	Update Catalog	July 6, 2021	Long-Term Servicing Branch

How often are cumulative updates released?

Microsoft rolls out cumulative updates to all supported versions of Windows on the second Tuesday of each month, which is called Patch Tuesday. Supported versions (outside of the Long-Term Servicing Branch) also get optional updates in the second half of the month. Those updates are then rolled into the Patch Tuesday updates of the following month.

Do I need to download updates manually?

For Patch Tuesday updates, supported versions of Windows will automatically download and install them each month. You can check for updates in the Settings app. Open the Update & Security section and click Check for Updates to start downloading them. We've included manual download links above, in case you have any difficulty installing them through Windows Update.

Optional updates aren't installed automatically, and you can use the links above to install them. These updates will also show up in Windows Update with the option to install them whenever you want.

Are there any issues with these updates?

Some Windows 10 updates come with known issues when they're released. These are included in the Knowledge Base (KB) articles listed for each update above.

How long will my version of Windows 10 be supported?

For Windows 10 Home and Pro editions, each version of Windows 10 is supported for 18 months after its initial release. For Enterprise and Education editions, versions released in the first half of the year (with version numbers ending in 03, 04, or H1) are also supported for 18 months. Versions released in the second half of the year are supported for 30 months. In special circumstances, Microsoft can support some releases for longer.

Windows 10 versions released in the Long-Term Servicing Branch/Long-Term Servicing Channel are supported for ten years after their initial release.

You can find an overview of the currently supported versions of Windows 10 and their end-of-service date here.