The situation. On a Windows 7 SP1 machine, I have updated with Windows6.1-KB2819745-x64-MultiPkg.msu. Furthermore, in PowerShell $PSVersionTable now reports ‘PSVersion 4.0’.>
I can only assume you installed the wrong package. Make sure you download the proper package from here.
Below you will see in running Windows 7 Service Pack 1 with PowerShell 4 using Test-Connection and Get-FileHash: