PowerShell – Fun With Loading $Profile

If you run $profile, you will get a path returned similar to the following:
C:\Users\<USERNAME>\Documents\WindowsPowerShell\Microsoft.PowerShellISE_profile.ps1

If you have a .ps1 with the file name, you can pre-load or execute scripts upon launching PowerShell.

For example, check out the following. PowerShell can greet you based on the time of day:

Add-Type -AssemblyName System.Speech
$name = [Environment]::UserName
$theTime = (Get-Date).Hour

if ($theTime -le 12)
   {
       [string]$theGreeting = "Good morning "
   }
if (($theTime -ge 12) -and ($theTime -le 18))
   {
     [string] $theGreeting = "Good afternoon "
   }
if (($theTime -ge 19) -and ($theTime -le 24))
   {
      [string]$theGreeting = "Good evening "
   }

$theVoice = New-Object -TypeName System.Speech.Synthesis.SpeechSynthesizer 
$theVoice.Speak("$theGreeting $name")

Reference:
http://technet.microsoft.com/en-us/library/ff730960.aspx