Windows 10 update booklet

 Windows 10 update booklet.



Feature updates for Windows 10 are released twice a year, around March and September, via the Semi-Annual Channel. They will be serviced with monthly quality updates for 18 or 30 months from the date of the release, depending on the lifecycle policy.

We recommend that you begin deployment of each Semi-Annual Channel release immediately as a targeted deployment to devices selected for early adoption and ramp-up to full deployment at your discretion. This will enable you to gain access to new features, experiences, and integrated security as soon as possible.

For information about servicing timelines, see

VersionServicing optionAvailability dateOS buildLatest revision dateEnd of service: Home, Pro, Pro Education, Pro for Workstations and IoT CoreEnd of service: Enterprise, Education and IoT Enterprise
21H1Semi-Annual Channel2021-05-1819043.12022021-09-012022-12-132022-12-13Microsoft recommends
20H2Semi-Annual Channel2020-10-2019042.12022021-09-012022-05-102023-05-09
2004Semi-Annual Channel2020-05-2719041.12022021-09-012021-12-142021-12-14
1909Semi-Annual Channel2019-11-1218363.17662021-08-26End of service2022-05-10


Enterprise and IoT Enterprise LTSB/LTSC editions

VersionServicing optionAvailability dateOS buildLatest revision dateMainstream support end dateExtended support end date
1809Long-Term Servicing Channel (LTSC)2018-11-1317763.21452021-08-262024-01-092029-01-09
1607Long-Term Servicing Branch (LTSB)2016-08-0214393.45832021-08-102021-10-122026-10-13
1507 (RTM)Long-Term Servicing Branch (LTSB)2015-07-2910240.190222021-08-10End of service2025-10-14

Windows 10 release history

Learn more about the contents of Windows 10 updates at Windows 10 Update History.

To update devices running Windows 10, version 2004 or 20H2 to Windows 10, version 21H1, you can speed up the update process using an enablement package.

OS buildAvailability dateServicing optionKb article
19043.12022021-09-01Semi-Annual ChannelKB 5005101
19043.11652021-08-10Semi-Annual ChannelKB 5005033
19043.11512021-07-29Semi-Annual ChannelKB 5004296
19043.11102021-07-13Semi-Annual ChannelKB 5004237
19043.10832021-07-06Semi-Annual ChannelKB 5004945
19043.10822021-06-29Semi-Annual ChannelKB 5004760
19043.10812021-06-21Semi-Annual ChannelKB 5003690
19043.10552021-06-11Semi-Annual ChannelKB 5004476
19043.10522021-06-08Semi-Annual ChannelKB 5003637
19043.10232021-05-25Semi-Annual ChannelKB 5003214
19043.9852021-05-18Semi-Annual ChannelKB 5003173

To update devices running Windows 10, version 2004 to Windows 10, version 20H2, you can speed up the process by updating using the enablement package. For more information, see KB4562830.

To update devices running Windows 10, version 1903 to Windows 10, version 1909, you can speed up the process by updating using the enablement package. For more information, see KB4517245.

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