![Windows Server 2012 R2 Troubleshooting: .NET Framework 3.5 installation failure (Offline/Online/GPO) - TechNet Articles - United States (English) - TechNet Wiki Windows Server 2012 R2 Troubleshooting: .NET Framework 3.5 installation failure (Offline/Online/GPO) - TechNet Articles - United States (English) - TechNet Wiki](https://gallery.technet.microsoft.com/site/view/file/182766/1/Specify%20the%20alternate%20source%20path%20in%20Server%20manager.png)
Windows Server 2012 R2 Troubleshooting: .NET Framework 3.5 installation failure (Offline/Online/GPO) - TechNet Articles - United States (English) - TechNet Wiki
Download Microsoft .NET Framework 3.5 Service pack 1 (Full Package) from Official Microsoft Download Center
![Windows Server 2012 R2 Troubleshooting: .NET Framework 3.5 installation failure (Offline/Online/GPO) - TechNet Articles - United States (English) - TechNet Wiki Windows Server 2012 R2 Troubleshooting: .NET Framework 3.5 installation failure (Offline/Online/GPO) - TechNet Articles - United States (English) - TechNet Wiki](https://gallery.technet.microsoft.com/site/view/file/182764/1/Install%20.Net%20Framework3.5%20Features%20on%20windows%20server%202012%20R2.png)
Windows Server 2012 R2 Troubleshooting: .NET Framework 3.5 installation failure (Offline/Online/GPO) - TechNet Articles - United States (English) - TechNet Wiki
![KB208233361: How to install .NET 3.5 on Windows 2012, Windows 8 and later - KB208233361: How to install .NET 3.5 on Windows 2012, Windows 8 and later - wiki.esko.com KB208233361: How to install .NET 3.5 on Windows 2012, Windows 8 and later - KB208233361: How to install .NET 3.5 on Windows 2012, Windows 8 and later - wiki.esko.com](https://wiki.esko.com/download/attachments/211029647/Specify%20settings%20for%20optional%20component%20installation%20and%20component%20repair.png?version=1&modificationDate=1529338716580&api=v2)