How to install .net framework 3.5 in windows server 2012

If you want to install .NET Framework 3.5 in windows server 2012, you will most likely see this error message when installing the feature:

“Do you want to specify an alternate source path? One or more installation selections are missing source files…”

To solve this, you can follow this steps :

1. Go to a command prompt and enter this:
   
   dism /online /enable-feature /featurename:NetFX3 /all /Source:d:\sources\sxs /LimitAccess
   Note: Source should be the Windows installation disc. In my case, this was located on D:
   
   
2. Go down to “Specify an alternate source path” and enter “d:\sources\sxs” as the path.
   
   
   
3. Now you can install .net framework on your windows 2012 server