从 http://www.microsoft.com/en-us/download/details.aspx?id=34595.不过，您需要 Windows 7 SP1.

Download and install from http://www.microsoft.com/en-us/download/details.aspx?id=34595. You need Windows 7 SP1 though.

值得记住的是，Windows 7 上的 PowerShell 3 没有 Windows 8 上的 PowerShell 3 的所有 cmdlet.因此，您可能仍会遇到系统上不存在的 cmdlet.

It's worth keeping in mind that PowerShell 3 on Windows 7 does not have all the cmdlets as PowerShell 3 on Windows 8. So you may still encounter cmdlets that are not present on your system.