The older .NET Framework version is now offered as a separate installer for applications needing it on modern Windows operating systems.
Microsoft’s .NET Framework 3.5, a development platform originally released in November 2007, will no longer be offered as an optional Windows feature. Going forward, Microsoft will provide it as a separate, standalone installer for upcoming Windows releases.
As announced in a February 5 bulletin, Microsoft states that from Windows 11 Insider Preview Build 27965 onward, .NET Framework 3.5 will need to be acquired via a standalone installer for compatible applications on newer Windows versions. This adjustment impacts all subsequent Windows platform releases but has no bearing on Windows 10 or older Windows 10 versions up to 25H2.
Microsoft explained that this alteration for .NET Framework 3.5 is consistent with its lifecycle, given that its support concludes on January 9, 2029. Users are advised to start planning their transition to more current, supported .NET versions. Resources such as installers, compatibility details, and suggested migration strategies are available on Microsoft Learn for those with applications relying on .NET Framework 3.5.
