In Windows 8 and Windows Server 2012 .Net Framework 3.5 is a function of on-demand distribution. Metadata based on features is included in Windows 8 and Windows Server 2012. However binary files and other files associated with the function are not included. When this feature is enabled Windows will try to download the missing information to install Windows updates for this feature and errors may occur.
The network configuration and the computer's installation of updates in this configuration environment may affect this process so you may encounter errors when installing this feature for the first time.
Specify another installation source and if one of the following conditions is true this error code may appear:
\u0026middot; The location specified by the path does not contain the files required to install the feature.
\u0026middot; The user trying to install the feature does not have at least read access to the location and file.
\u0026middot; The installation file set is damaged incomplete or invalid for the version of Windows you are running.
To resolve this issue make sure that the full path to the source is correct (x:sourcessxs) and you have at least read access to the location. To do this try to access the source directly from the affected computer. Verify that the installation source contains a valid and complete set of files. If the problem persists try a different installation source.
?0x800F0907 error solution when installing .NET 3.5 on windows8