Enabling the .Net framework feature in windows 7 can be done using manually but if you want to do this on all clients ,how do you manage it ? Script Based using OCsetup ? or enabling this feature in Image ? or PowerShell script ?
I go with DISM (Deployment Image Servicing and Management)tool to enable this feature.
Download and install WAIK to get DISM tool http://www.microsoft.com/download/en/details.aspx?id=10333
Deployment Image Servicing and Management (DISM) is a command-line tool used to service Windows® images offline before deployment. You can use it to install, uninstall, configure, and update Windows features, packages, drivers, and international settings. Subsets of the DISM servicing commands are also available for servicing a running operating system
Create a folder with standard naming procedure and place DISM.EXE (for 64 Bit and 32 Bit) ,share folder would be better.
Go to sccm and create new package using the above source location as data Source
Create program with command line : Dism.exe /online /Enable-Feature /FeatureName:NetFx3
Get list of available features from windows 7 machine using DISM tool with command prompt : Dism /online /Get-Features (run the cmd prompt with admin account)
Create Advertisement and move it onto collection you needed.
You know what next to do with this …Monitoring the deployment status and fix the issues