Installing .NET Framework 3.5 Feature Fails on Server 2012 – Installation of one or more roles, role services, or features failed
- Mount the Windows Server 2012 iso to your VM
- Check which Drive the ISO Maps to, usually D:\
- Open Add Roles and Features Wizard
- Select .NET Framework 3.5 Features and then click Next>
- Select: Specify an alternate source path link
- Enter the path as: D:\Sources\SxS and then click OK
- Complete the Installation as normal