if you meet this issue when using nuget to inst...

EntityFramework.5.0.0: Failed to initialize the Powershell host. If your powershell execution policy setting is set to AllSigned, open the package manager console to initialize the host first.

jQuery.1.7.1.1: Failed to initialize the Powershell host. If your powershell execution policy setting is set to AllSigned, open the package manager console to initialize the host first.

resolve steps:

1.ensure powershell 2.0 installed at your machine

2.please ensure powershell2.0 function has been checked in "change/remove program function"

3.remove the EF5 reference,and then reference EF5 package from asp.net mvc4 folder