Install .Net 3.5 on Server 2012 / 2012R2

Getting failure when trying to Install .Net 3.5 from the “Add Roles and Featured Wizard”

you’re getting the message “On the Confirm installation selections screen, a warning will be displayed asking Do you need to specify an alternate source path? ”

in this case of warning message you can use with the following solutions –

• via CMD :
  
  Install .Net 3.5 Offline

  PowerShell

  DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /Source:d:\sources\sxs

  1	DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /Source:d:\sources\sxs

  
  you must insert the ISO file / Installation Disk
• via Powershell :
  
  Install .Net 3.5 via Powershell

  PowerShell

  Install-WindowsFeature Net-Framework-Core -source \\network\share\sxs

  1	Install-WindowsFeature Net-Framework-Core -source \\network\share\sxs

  
  Note:\\network\share\sxs is the location of the source files.