Windows 10 Insider Preview Build 21390 X86 X64 Iso Incl Jun 2026

Because Build 21390 expired in 2021, a fresh install will boot into a loop. To fix this:

Developers use it to test app compatibility with new icons and the updated Windows Terminal default setting.

Though Build 21390 did not introduce sweeping functionality revamps, it marked the commercial debut of Microsoft’s new and refined core system tools.

The "21390 ISO" refers to the installation file containing this specific development build. For modern 64-bit systems. windows 10 insider preview build 21390 x86 x64 iso incl

Users in the Chinese community also reported an issue where the under this build. Some users also reported that USB audio jacks stopped working properly after upgrading to this build, with headphones connected to the audio jack still playing sound through the computer's speakers instead. Additionally, printer driver installation issues were reported for USB-connected printers.

While build 21390 was a minor update, it introduced several polished visual elements that eventually became standard: New Fluent Icons: Updated iconography for Task Manager MSI Installers Terminal Integration: For the first time, users could set Windows Terminal Preview (v1.9+) as the default terminal emulator. Sun Valley Glimpse: It featured early previews of Windows 11 desktop icons Segoe UI Variable Final Appearance of Live Tiles:

Q: Can I revert to a previous build if I encounter issues? A: Yes, you can revert to a previous build within a limited time frame (typically 10 days) by going to Settings > Update & Security > Recovery. Because Build 21390 expired in 2021, a fresh

Windows 10 Insider Preview Build 21390 was a milestone build released in May 2021 as part of the "Dev Channel" (formerly the Fast Ring) . This specific build is now considered and is no longer officially supported by Microsoft.

: It featured early previews of the Segoe UI Variable font and Windows 11-style desktop icons. Release History and Technical Details

Windows Installer package files ( .msi ) were updated to match the newer aesthetic. 2. Native Windows Terminal Integration The "21390 ISO" refers to the installation file

The leak of Build 21390 caused a significant stir within the Windows Insider community. Some users were thrilled to have access to the latest build, while others expressed concern about the potential security risks.

: For many, this build is remembered as the last version of Windows to feature the Live Tiles

Here are some key aspects of Build 21390:

The program manager, Rachel, immediately contacted the company's security team to assess the situation. They quickly verified that the leak was legitimate and contained sensitive information. Rachel and her team worked over the weekend to contain the damage, updating their internal systems and re-issuing new, non-leaked builds to Insiders.

: The most visible change was the introduction of new Fluent Design icons for the Task Manager and MSI installers .