Scroll to the "Select edition" section and locate .
: This was the last build where the Windows 8-era Live Tiles were fully present before they were replaced by the static "Pinned" apps and Widgets in Windows 11. A "Hybrid" Visual State
Windows 10 Insider Preview Build 21390 (both x86 and x64 ISOs) is a historically significant release that marks the end of an era for Windows 10 feature development. Its new Fluent icons, Windows Terminal integration, and last‑of‑its‑kind status make it a fascinating build for enthusiasts, developers, and anyone interested in the evolution of Microsoft’s operating systems. Windows 10 Insider Preview Build 21390 -x86 X64- ISO Incl
The standard choice for modern hardware. It supports more than 4GB of RAM and is required for resource-intensive development tools and modern virtualization.
While Build 21390 did not introduce massive UI overhauls, it focused heavily on visual consistency, stability, and preparation for next-generation system infrastructure. Scroll to the "Select edition" section and locate
Do not use that specific ISO unless you obtained it directly from Microsoft and verified signatures/checksums; if you already downloaded it, delete it and obtain the build via official channels, or run strong malware scans in an isolated environment.
Select to perform a clean installation, format your target drive partition, and follow the on-screen prompts to complete setup. Important Considerations for Insider Builds Its new Fluent icons, Windows Terminal integration, and
Windows 10 Insider Preview Build 21390 (x86/x64): Features, ISOs, and Installation Guide
Microsoft reintroduced and refined the candidate window design for the Japanese and Chinese IMEs.
Windows 10 Insider Preview Build 21390 was a significant release within the Dev Channel, serving as a critical bridge between the "Cobalt" semester development and the eventual unveiling of Windows 11. Released on May 26, 2021, this build focused on refining the user interface with Fluent Design iconography and testing the platform's long-term servicing pipeline. Key Features and UI Improvements
| Feature | x86 (32‑bit) | x64 (64‑bit) | | --------------------- | -------------------------------- | -------------------------------- | | Maximum RAM | 4 GB | 128 GB (or more, depending on edition) | | Processor requirement | Any 32‑bit or 64‑bit CPU | 64‑bit CPU with support for certain instructions | | Software compatibility | Runs only 32‑bit applications | Runs both 32‑bit and 64‑bit apps | | Best for | Very old PCs, VMs with limited RAM | Modern PCs, development, gaming, productivity |