Windows 11 is the current major release of Microsoft's Windows NT operating system, released on October 5, 2021, as the successor to Windows 10 (2015). It is available as a free upgrade for devices running Windows 10 that meet its system requirements. The Windows Server counterpart, Windows Server 2025, was released in 2024. It is the first major version of Windows without a corresponding mobile edition, following the end of support for Windows 10 Mobile, and is implemented to mobile devices with different form factors, screen sizes and CPU architectures (including tablets and handheld game consoles with smaller screen sizes) as a unified edition of Windows. As of October 14, 2025, it is the only fully supported consumer-oriented version of Windows.
The operating system introduced a redesigned Windows shell influenced by elements of the canceled Windows 10X project, including a centered Start menu, a separate "Widgets" panel replacing live tiles, and new window management features. It also incorporates gaming technologies from the Xbox Series X and Series S, such as Auto HDR and DirectStorage on supported hardware. The Chromium-based Microsoft Edge remains the default web browser, replacing Internet Explorer, while Microsoft Teams is integrated into the interface. Microsoft also expanded support for third-party applications in the Microsoft Store, including limited compatibility with Android apps through a partnership with the Amazon Appstore.
Windows 11 introduced significantly higher system requirements than typical operating system upgrades, which Microsoft attributed to security considerations. The operating system requires features such as UEFI, Secure Boot, and Trusted Platform Module (TPM) version 2.0. Official support is limited to devices with an eighth-generation Intel Core or newer processor, a second-generation AMD Ryzen or newer processor, or a Qualcomm Snapdragon 850 or later system-on-chip. These restrictions exclude a substantial number of systems, prompting criticism from users and media. While installation on unsupported hardware is technically possible, Microsoft does not guarantee access to updates or support. It is the first version of Windows without a 32-bit build, running only on x86-64 and ARM64 architectures; despite this, it is still able to run 32-bit applications through the WoW64 subsystem, which 64-bit versions of Windows have been using since Windows XP.
Windows 11 received mixed reviews upon its release. Prelaunch discussion focused on its increased hardware requirements, with debate over whether these changes were primarily motivated by security improvements or to encourage users to purchase newer devices. The operating system was generally praised for its updated visual design, improved window management, and enhanced security features. However, critics pointed to changes in the user interface, such as limitations on taskbar customization and difficulties in changing default applications, as steps back from Windows 10. In June 2025, Windows 11 surpassed Windows 10 as the most installed version of Windows worldwide. As of October 2026, Windows 11 is the most used version of Windows, accounting for 74% of the worldwide market share, while its predecessor Windows 10 holds 25%, and Windows 7 holds less than 1%. Windows 11 is the most-used traditional PC operating system, with a 38% share of users.
At the 2015 Ignite conference, Microsoft employee Jerry Nixon stated that Windows 10 would be the "last version of Windows". The operating system was considered to be a service, with new builds and updates to be released over time. PC World argued that the widely reported comment was, however, taken out of context, noting that the official event transcript marks it only as a segue rather than a core part of the talk. It argues that Nixon was referring to the fact that he could talk freely at the event because 10 was the last version in current development.
In October 2019, Microsoft announced "Windows 10X", a future edition of Windows 10 designed exclusively for dual-touchscreen devices such as the then-upcoming Surface Neo. It featured a modified user interface designed around context-sensitive "postures" for different screen configurations and usage scenarios, and changes such as a centered taskbar and updated Start menu without Windows 10's "live tiles". Legacy Windows applications would also be required to run in "containers" to ensure performance and power optimization. Microsoft stated that it planned to release Windows 10X devices by the end of 2020.
In May 2020, during the COVID-19 pandemic, Panos Panay, Microsoft's chief product officer for Microsoft Windows and Microsoft Office, stated that "as we continue to put customers' needs at the forefront, we need to focus on meeting customers where they are now", and announced that Windows 10X would only launch on single-screen devices at first, and that Microsoft would "continue to look for the right moment, in conjunction with our OEM partners, to bring dual-screen devices to market".
In October 2020, reports emerged that Microsoft was working on a user interface refresh for Windows 10 codenamed "Sun Valley", scheduled to be included in a late-2021 feature update codenamed "Cobalt". Internal documentation stated that the aim for "Sun Valley" was to "reinvigorat[e]" the Windows user interface and make it more "fluid", with a more consistent application of WinUI, while reports suggested Microsoft planned to adapt UI elements seen in Windows 10X. In January 2021, it was reported that a job listing referring to a "sweeping visual rejuvenation of Windows" had been posted by Microsoft.
By December 2020, Microsoft had begun to implement and announce some of these visual changes and other new features on Windows 10 Insider Preview builds, such as new system icons (which also included the replacement of shell resources dating back as far as Windows 95), improvements to Task View to allow changing the wallpaper on each virtual desktop, x86-64 emulation on ARM, and adding the Auto HDR feature from Xbox Series X.
On May 18, 2021, Head of Windows Servicing and Delivery John Cable stated that Windows 10X had been canceled and that Microsoft would be "accelerating the integration of key foundational 10X technology into other parts of Windows and products at the company".
At the Microsoft Build 2021 developer conference, CEO and chairman Satya Nadella teased about the existence of the next generation of Windows during his keynote speech. According to Nadella, he had been self-hosting it for several months. He also teased that an official announcement would come very soon. Just a week after Nadella's keynote, Microsoft started sending invitations for a dedicated Windows media event at 11:00 a.m. ET on June 24, 2021. Microsoft also posted an 11-minute video of Windows start-up sounds to YouTube on June 10, 2021, with many people speculating both the time of the Microsoft event and the duration of the Windows start-up sound video to be a reference to the name of the operating system as Windows 11.
On June 24, 2021, Windows 11 was officially announced at a virtual event hosted by Chief Product Officer Panos Panay. According to Nadella, Windows 11 is "a re-imagining of the operating system". Further details for developers such as updates to the Microsoft Store, the new Windows App SDK (code-named "Project Reunion"), new Fluent Design guidelines, and more were discussed during another developer-focused event on the same day.
The Windows 11 name was accidentally released in an official Microsoft support document in June 2021. Leaked images of a purported beta build of Windows 11's desktop surfaced online later on June 15, 2021, which were followed by a leak of the aforementioned build on the same day. The screenshots and leaked build show an interface resembling that of the canceled Windows 10X, alongside a redesigned out-of-box experience (OOBE) and Windows 11 branding. Microsoft would later confirm the authenticity of the leaked beta, with Panay stating that it was an "early weird build".