A planned October 2021 release date for Windows 11 has been accidentally leaked in support documents from both Microsoft and Intel.

When Microsoft formally announced Windows 11 in June, they did not provide an official release date, only saying it would be released later this year.

“Upgrade rollout plan is being finalized and is scheduled to begin late in 2021 and continue into 2022. Specific timing will vary by device. Certain features require specific hardware,” revealed Microsoft in their Windows 11 announcement.

However, support documents released over the past two months from Microsoft and Intel have revealed that the plan is to release Windows 11 in October, or at the latest, in November this year.

Intel’s July graphics driver release notes stated that the drivers are compatible with Windows 11, which they listed as the “October 2021 Update (21H2),” as shown below.

Operating Systems:
        Microsoft Windows* 10-64 - October 2018 Update (1809)(RS5)
        Microsoft Windows* 10-64 - May 2019 Update (1903)(19H1)
        Microsoft Windows* 10-64 - November 2019 Update (1909)(19H2)
        Microsoft Windows* 10-64 - May 2020 Update (2004)(20H1)
        Microsoft Windows* 10-64 - October 2020 Update (20H2)
	Microsoft Windows* 10-64 - May 2021 Update (21H1)
        Microsoft Windows* 11-64 - October 2021 Update (21H2)

While Intel has removed the name of the Windows 11 update from the support document, an archived version shows the original compatibility list.

Today, WindowsLatest noted that a Windows Hardware Certification blog post from June announced that Microsoft was accepting Windows 11 driver submissions.

Towards the end of the document, Microsoft notes that Windows partners had until September 24th, 2021, to submit their drivers for compatibility if they wanted their drivers to ship with Windows 11, version 21H2.

Windows 11, version 21H2 based systems may ship with drivers that have achieved compatibility with Windows 10, version 2004 until September 24, 2021,” reads Microsoft’s support document.

“Partners looking to achieve compatibility for systems shipping with Windows 11, version 21H2 Release may factory-install drivers for components that achieved compatibility with Windows 10, version 2004 until September 24, 2021.”

While Microsoft may adjust the release schedule, since the release of Windows 10, a new version of the operating system has been released every fall, either in October or November.

Windows 10 Version Feature Update Name Release date
1507   July 29, 2015
1511 November Update November 10, 2015
1607 Anniversary Update August 2, 2016
1703 Creators Update April 5, 2017
1709 Fall Creators Update October 17, 2017
1803 April 2018 Update April 30, 2018
1809 October 2018 Update November 13, 2018
1903 May 2019 Update May 21, 2019
1909 November 2019 Update November 12, 2019
2004 May 2020 Update May 27, 2020
20H2 October 2020 Update October 20, 2020
21H1 May 2021 Update May 18, 2021

With the deadlines and clues from the support documents, we expect Windows 11 to be released in October 2021.

However, even if the update is called the ‘October 2021 Update,’ Microsoft could still push it back to November, as seen with the Windows 10 October 2018 Update.