missing .net 3.5 on windows 11

yoshobanta garnaik 5 Reputation points
2026-08-20T18:10:45.4466667+00:00

on my windows11 .net 3.5 not available to install WhatsApp Image 2026-08-20 at 23.38.09

Developer technologies | .NET | .NET Runtime
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  1. Danny Nguyen (WICLOUD CORPORATION) 8,450 Reputation points Microsoft External Staff Moderator
    2026-08-21T01:31:22.18+00:00

    Hi @yoshobanta garnaik ,

    The installation method depends on your Windows 11 version.

    Please press Windows + R, enter winver, and share the Windows version and OS build shown there.

    • Windows 11 26H1 (build 28000) or later: .NET Framework 3.5 no longer appears in Windows Features. Please download and install it using the standalone installer provided here:
      Install .NET Framework 3.5 on Windows 11
    • Windows 11 25H2 or earlier: .NET Framework 3.5 should be available as an optional Windows feature.

    If the installation fails, please also share the complete error message or error code.

    If you found my response helpful or informative, I would greatly appreciate it if you could follow this guidance or provide feedback.

    Thank you.

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  2. AI answer

    2026-08-20T18:11:05.6433333+00:00

    On Windows 11, this depends on the Windows version:

    1. Check the Windows version first:
      • Press Windows + R
      • Run winver.exe
      • If the version is Windows 11 26H1 (build 28000) or later, .NET Framework 3.5 will not appear in Turn Windows features on or off.
    2. If the device is Windows 11 26H1 (build 28000) or later:
    3. If the device is Windows 11 25H2 or earlier:
      • Open Windows Features.
      • Select .NET Framework 3.5 (includes .NET 2.0 and 3.0).
      • Select OK.
      • Restart if prompted.
    4. If ASP.NET 3.5 is needed in IIS on Windows 11 26H1 or later:
      • Install .NET Framework 3.5 first.
      • Enable IIS with ISAPI Filters and ISAPI Extensions.
      • Run the Enable-ASPNet35.ps1 script from an Administrator PowerShell 5.1 window.

    Also, on Windows 11 26H1 and later, these optional components were removed from Windows Features:

    • ASP.NET 3.5
    • .NET Extensibility 3.5
    • WCF HTTP Activation
    • WCF non-HTTP Activation
    AI-generated content may be incorrect. Read our transparency notes for more information.

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