To copy and paste on Windows Powershell screen, you need to select text on powershell screen and press right click button on mouse.
PowerShell Tip# 2: How to execute PowerShell Program without typing whole file path.Generally to run any windows powershell program you need to type whole file path. In order to avoid that follow following:
Note: I am trying to run program which is on my C:\MyPowerShell\HelloWorld.PS1
PS C:\Users\shriganesh> cd C:\MyPowerShell
PS C:\MyPowerShell> .\HelloWorld.PS1
Hello World
Here you can change directory using cd command and after changing directory you can run program simply by prefixing .\ to filename.