Microsoft .NET Framework 3.5 fails to install the server roles on Windows computers
Article ID: INS0032 During the Commvault software installation, .NET Framework might fail to install the server roles.
Microsoft .NET Framework 3.5 fails to install on the computers that run Windows Server 2012 (including R2 editions), Windows 8, Windows 8.1, or Windows 10 and reports one of the following errors:
DISM.exe failed to install Server roles with error: -2146498298
Failed to install package dotnetfx35role2012 with error code 0x800F0906
During an installation of the Commvault software, the Microsoft .NET Framework 3.5 is installed automatically. Client computers that run certain operating systems might not be able to download the required software files from Windows Update.
Refer to the resolutions described in Microsoft support article ".NET Framework 3.5 installation error: 0x800F0906, 0x800F081F, 0x800F0907": https://support.microsoft.com/en-us/kb/2734782, and then retry the installation.