Can’t install SQL Server 2012 or 2014 instance on Windows 2008 SP2
Problem: If you use the Report Services Configuration wizard to install a new instance of SQL Server version 2012 or 2014 on Windows Server 2008 SP2, the installation fails if Windows Powershell 2.0+ or Windows Management Framework 2.0 is not already installed. The installation failure has an exit code of 0x84BE0260 (KB-7096).
Explanation: Windows Server 2008 SP2 doesn’t include PowerShell 2.0 or Windows Management Framework 2.0 by default. Later versions of Windows Server do include these components by default.
Solution: Install PowerShell 2.0 or higher and Windows Management Framework 2.0 before you run the Report Services Configuration Wizard to install a new instance of Microsoft SQL Server 2012 or 2014.
You can download Windows Management Framework 2.0 from https://support.microsoft.com/en-us/kb/968930.