If an utility requires the .NET framework 3.5, however would not in finding that version enabled in your computer, it shows the following message box in Windows 8, both all the way through set up, or while you open the applying for the first time. In the message box, choose Install this feature to enable the .NET Framework 3.5. This option requires an Internet connection. If in case you have ever tried to update the . net frame work 3.5 from windows features you will get 0x800F0906 or 0x800F081F error . In this article I am showing How to fix . net framework 3.5 installation in windows 8 or 8.1 error code 0x800f0906 or 0x800F081F. . NET Framework 4.5 is enabled by default in Windows 8 and Windows 8.1. Windows 8 & Windows 8.1 does not include .NET 3.5 by default, but the files for .NET 3.5 are available on the Wind...