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Offline Dot Net 3.5 Install

I have software that requires Dot Net 3.5, I tried downloading the offline installer and it still tries to contact Microsoft Update. The computer is firewalled from the internet and cannot connect to Microsoft Update. Is there a way to download a Windows 10 iso or wim file? Is there a fix for the offline dot Net 3.5 installer?

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Kirito|Microsoft Community Support Specialist

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Hello,  

Try the DISM method to enable .NET Framework 3.5 on your system. 

Please refer following step-by-step guide: 

https://www.kapilarya.com/how-to-enable-net-framework-3-5-in-windows-11

Let us know if this helps! 

Note: Included link in this reply refers to blog post by a trusted Microsoft MVP.

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Microsoft MVP (Windows IT Pro), since 2014 · Windows Insider MVP, since 2016 · Windows Help (www.kapilarya.com)

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Last updated March 27, 2025 Views 70 Applies to: