In my recent post, I’ve touched upon the .NET Framework in Windows OS. Every Windows version has a .NET Framework version installed and enabled by default. In Windows 10/8, .NET Framework 3.5 is disabled by default. But there are many programs that still require .NET 3.5 to run. If you try to require some software or app which requires .NET Framework 3.5, you might have faced the following message:

.NET Framework 3.5 missing? Enable it

Now to enable it, you have to move to Windows Feature. This can be accessed via Control Panel > Programs and Features.

If you don’t have a strong internet connection on your system, the download of required files may take a bit long time, and thus the overall process becomes lengthy.

If you try to download the full setup of .NET, it is 291 MB in size, and you will obviously need a fast connection to do it quickly.

Install .NET Framework 3.5.1 on Windows 10

1. Open the .iso file of Windows OS with a compression/decompression software like 7-Zip. Open the Sources folder and find sxs folder. Now copy this folder to the following location:

C:\Temp

2. Next, run the Command Prompt as administrator, and type the following command:

dism.exe /online /enable-feature /featurename:NetFX3 /All /Source:c:\temp\sxs /LimitAccess

That’s it!

Now reboot and check the Windows Feature window again. You’ll see the first option is automatically checked.

You will now also be able to run software or app which requires .NET (like AutoCAD. etc.), without any problems.