How to install .NET Framework 3.5 on Windows 8

Copy “sxs” folder (It’s in sources folder in Windows 8 operating System image: Eg: D:\sources\sxs) and paste it on root drive, C:\sxs

Open Command prompt as Administrator

And Copy and paste this command line and run

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

Result as below

C:\Windows\system32>dism.exe /online /enable-feature /featurename:NetFX3 /Source :c:\sxs /LimitAccess

Deployment Image Servicing and Management tool

Version: 6.2.9200.16384

Image Version: 6.2.9200.16384

Enabling feature(s)

[==========================100.0%==========================]

The operation completed successfully.