Use this for single machines or troubleshooting.
Example: Installing .NET Framework 3.5
DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /Source:D:\sources\sxs
Best method: Download the official “Windows 10 21H2 Features on Demand” ISO from Microsoft Volume Licensing Service Center (if licensed) or Visual Studio Subscriptions. No public free download exists for the FoD ISO alone without a subscription. For non‑enterprise users, rely on the Windows Update Catalog for individual CABs or use the base Windows 10 ISO for .NET 3.5 only. windows 10 21h2 features on demand iso download best
Avoid third‑party ISO sites – they risk malware. Always verify SHA‑256 hashes against Microsoft’s published values.
The official way to download the Windows 10, version 21H2 Features on Demand (FOD) ISO is through Microsoft's professional and enterprise-focused distribution channels. Because Windows 10 support for most editions ended on October 14, 2025, these older ISOs are typically reserved for organizations with existing subscriptions. Official Download Channels Use this for single machines or troubleshooting
To ensure you receive untampered .cab files for offline deployment, use the following official Microsoft repositories:
Volume Licensing Service Center (VLSC): The primary source for organizations. Search for "Windows 10 (business editions), Version 21H2" to find supplemental media like the FOD ISO. Example: Installing
Visual Studio Subscriptions (MSDN): Ideal for developers and IT professionals with active subscriptions. You can download the "Windows 10, version 21H2 Features on Demand" ISO directly from the subscriber portal.
Microsoft 365 Admin Center: Enterprise administrators can find Windows 10 installation media and supplemental feature packs under the "Software" or "Billing" sections. What is in the Features on Demand ISO?
FODs are optional Windows features—like language resources, handwriting recognition, or the .NET Framework (.NetFx3)—that are not installed by default to save disk space. Deploy Windows 10 21H2 using SCCM / MEMCM
For mass deployment, copy the contents of the FOD ISO to a network share.