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missing .net 3.5 on windows 11
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(192, 14.000000000000002%, 28%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EYG%3C/text%3E%3C/svg%3E)
yoshobanta garnaik
5
Reputation points
on my windows11 .net 3.5 not available to install
Developer technologies | .NET | .NET Runtime
3 answers
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(262.40000000000003, 49%, 35%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EDN%3C/text%3E%3C/svg%3E)
Danny Nguyen (WICLOUD CORPORATION) 8,725 Reputation points Microsoft External Staff Moderator2026-08-21T01:31:22.18+00:00 Hi @yoshobanta garnaik ,
The installation method depends on your Windows 11 version.
Please press
Windows + R, enterwinver, 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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Danny Nguyen (WICLOUD CORPORATION) 8,725 Reputation points Microsoft External Staff Moderator
2026-08-26T07:05:01.59+00:00 Hi @yoshobanta garnaik , just checking in. Did my answer help with your problem? Feel free to reach out if you need any help.
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Danny Nguyen (WICLOUD CORPORATION) 8,725 Reputation points Microsoft External Staff Moderator
2026-08-28T07:15:11.95+00:00 As we haven’t heard back from you for a while, we’ll go ahead and close this thread for now.
If you still need assistance later, feel free to reach out.
Thank you for your understanding.
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yoshobanta garnaik 5 Reputation points
2026-09-03T06:16:20.5333333+00:00 I did every step what you have mentioned. But my application still not worked . Already installed 3.5 successfully but not showing in cmd also
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Danny Nguyen (WICLOUD CORPORATION) 8,725 Reputation points Microsoft External Staff Moderator
2026-09-03T06:39:56.41+00:00 Hi @yoshobanta garnaik ,
Thanks for the screenshot — it helps a lot.
From your output, your build is 10.0.28120, which is Windows 11 26H1 or later. On these builds, .NET Framework 3.5 is no longer a Windows component, so Dism /online /enable-feature /featurename:NetFx3 will always return 0x800f080c – Feature name NetFx3 is unknown. That's expected on 26H1 and doesn't mean your installation failed. DISM and "Turn Windows features on or off" won't show it as present even after the standalone installer succeeds.
Reference: Install .NET Framework 3.5 on Windows 11 and the .NET Framework 3.5 on Windows 11 FAQ
To confirm it's actually installed, please check the registry instead of cmd/DISM:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v3.5
If Install is 1, .NET Framework 3.5 is installed on your machine.
If your app is a web app running under IIS: on 26H1, ASP.NET 3.5 and .NET Extensibility 3.5 were removed from Windows optional components, so ASP.NET 3.5 needs an extra registration step. You'll need to enable IIS with ISAPI Filters and ISAPI Extensions, then run the Enable-ASPNet35.ps1 script from an elevated PowerShell 5.1 window. The steps are in the same article linked above. Note that even after running the script, DISM still won't list those components — that's by design.
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yoshobanta garnaik 5 Reputation points
2026-09-03T07:06:07.6533333+00:00 PS C:\Users\yoshobanta\OneDrive\Desktop\Downloads> .\Enable-ASPNet35.ps1
ASP.NET 3.5 Management Script
Detected OS: Win32NT 10.0 Build 28120
Detected OS Architecture: 64-bit
PowerShell Version: 5.1.28000.2738 (x64)
ERROR: .NET Framework 2.0 is not installed on this system.
Script execution terminated.
PS C:\Users\yoshobanta\OneDrive\Desktop\Downloads>
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yoshobanta garnaik 5 Reputation points
2026-09-03T07:15:44.2966667+00:00 plz do onething. access my laptop and help me do installation on .net 3.5
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Danny Nguyen (WICLOUD CORPORATION) 8,725 Reputation points Microsoft External Staff Moderator
2026-09-04T01:43:55.21+00:00 Hi @yoshobanta garnaik ,
Thanks for the output — it helps.
Enable-ASPNet35.ps1 only re-enables ASP.NET 3.5 on top of an existing .NET Framework 3.5 install; it doesn't install .NET 3.5 itself. Since .NET 3.5 includes .NET 2.0, that error suggests .NET Framework 3.5 isn't actually installed on the machine yet.
On build 28120 (Windows 11 26H1), the only supported method is the standalone installer here: Install .NET Framework 3.5 on Windows 11
Could you confirm:
- Did you run that standalone installer (the 26H1 one), and did it finish without error? If you enabled .NET 3.5 on an earlier build, it doesn't carry over after upgrading — it needs reinstalling.
- Check HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v3.5 — if Install is 1, it's installed.
Then re-run the script from an elevated PowerShell 5.1 window.
On accessing your laptop — sorry, I can't do that; this is a public forum and I can only help through the thread. If you need hands-on help, please open a Microsoft support request.
If the installer fails, share the exact error and I'll take a look.
Thank you.
Sign in to comment - 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:
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AI answer
2026-08-20T18:11:05.6433333+00:00 On Windows 11, this depends on the Windows version:
- Check the Windows version first:
- Press
Windows + R - Run
winver.exe - If the version is Windows 11 26H1 (build 28000) or later,
.NET Framework 3.5will not appear in Turn Windows features on or off.
- Press
- If the device is Windows 11 26H1 (build 28000) or later:
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.NET Framework 3.5is only available as a standalone installer. - It can no longer be installed as a Windows component.
- Use:
- Important: these installers only work with the specified Windows version.
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- 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.
- If ASP.NET 3.5 is needed in IIS on Windows 11 26H1 or later:
- Install
.NET Framework 3.5first. - Enable IIS with ISAPI Filters and ISAPI Extensions.
- Run the
Enable-ASPNet35.ps1script from an Administrator PowerShell 5.1 window.
- Install
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. - Check the Windows version first: