Issue with installing Entity Framework in Visual Studio 2013 Pro

Hi,

I just crated a simple project in VS 2013 Pro and trying to install Entity Framework but I get the folling error. I tried to do it fro Package Manager also but I got error (Server returned error (403) Forbidden).  

Any help would be appreciated,

Dave

PM> Install-Package EntityFramework
The source at nuget.org [https://www.nuget.org/api/v2/] is unreachable. Falling back to NuGet Local Cache at C:\Users\419282.BA.002\AppData\Local\NuGet\Cache
Install-Package : Unable to read package from path 'EntityFramework.6.1.3.nupkg'.
At line:1 char:16+ Install-Package <<<<  EntityFramework+ CategoryInfo          : NotSpecified: (:) [Install-Package], InvalidDataException+ FullyQualifiedErrorId : NuGetCmdletUnhandledException,NuGet.PowerShell.Commands.InstallPackageCommand