You can download .NET Framework 3.5 from the official Microsoft website:
On Windows 10 and Windows 11, .NET 3.5 is built into the operating system but disabled by default. You do not need to download an installer manually.
On modern operating systems, .NET 3.5 is already "on" your computer but disabled by default. You don't actually need an external download link; you just need to enable it.
Introduced the core engine and base class libraries. net framework 35 includes net 20 and 30 download link
If your computer is part of a corporate domain, Group Policy might force the machine to look at a local WSUS (Windows Server Update Services) server instead of Microsoft's public servers. WSUS often lacks the Feature on Demand payloads. Ask your network administrator to enable the policy: Computer Configuration > Administrative Templates > System > Specify settings for optional component installation and component repair , and check "Download repair content and optional features directly from Windows Update instead of Windows Server Update Services (WSUS)" .
Run: dism /online /enable-feature /featurename:NetFx3 /All /Source:D:\sources\sxs (Replace D: with your USB/ISO drive letter). Frequently Asked Questions
These codes indicate that Windows Update cannot locate or download the source files. You can download
added new APIs (WPF, WCF, WF) but kept the same CLR 2.0 engine.
Here’s a short, informative piece about the , including its relationship with versions 2.0 and 3.0, along with the official download link.
Use the DISM method (Method 2 above) with Windows installation media as the source. You don't actually need an external download link;
Yes, you can have both. Installing .NET 4.8 (the modern version) does replace .NET 3.5. Many legacy apps specifically require the 2.0/3.0 architecture found in the 3.5 package, so it is perfectly normal to have both installed simultaneously. Final Thoughts
Get-ChildItem 'HKLM:\SOFTWARE\Microsoft\NET Framework Setup\NDP' | Get-ItemProperty
Released in 2006, .NET Framework 3.0 did not replace .NET 2.0, nor did it introduce a new CLR. Instead, it was built directly on top of .NET 2.0 and used the exact same CLR 2.0 execution engine. .NET 3.0 simply added a set of revolutionary new development frameworks, often referred to as the "Foundation" technologies:
If the online method fails, you can use your Windows installation media (USB or ISO) to install it offline using the Command Prompt: Insert your Windows USB drive (let's assume it's drive D: ). Open Command Prompt (Admin) .