https://github.com/PowerShell/PowerShell#get-powershell
https://www.microsoft.com/en-us/download/details.aspx?id=54616 Win7AndW2K8R2-KB3191566-x64.zip
установить Win7AndW2K8R2-KB3191566-x64.msu
запустить PowerShell-6.0.2-win-x64.msi
https://www.powershellgallery.com/packages/PowerShellISE-preview/5.1.0.1
Find-Module *ise*
Install-Module -Name PowerShellISE-preview -Scope CurrentUser
PS C:\> isep