gistfile1.ps1

# Get the ID and security principal of the current user account
$myWindowsID=[System.Security.Principal.WindowsIdentity]::GetCurrent()
$myWindowsPrincipal=new-object System.Security.Principal.WindowsPrincipal($myWindowsID)

# Get the security principal for the Administrator role
$adminRole=[System.Security.Principal.WindowsBuiltInRole]::Administrator

# Check to see if we are currently running "as Administrator"
if ($myWindowsPrincipal.IsInRole($adminRole))
   {
   # We are running "as Administrator" - so change the title and background color to indicate this
   $Host.UI.RawUI.WindowTitle = $myInvocation.MyCommand.Definition + "(Elevated)"
   $Host.UI.RawUI.BackgroundColor = "DarkBlue"
   clear-host
   }
else
   {
   # We are not running "as Administrator" - so relaunch as administrator
   # Create a new process object that starts PowerShell
   $newProcess = new-object System.Diagnostics.ProcessStartInfo "PowerShell"

   # Specify the current script path and name as a parameter
   $newProcess.Arguments = $myInvocation.MyCommand.Definition
   # Indicate that the process should be elevated
   $newProcess.Verb = "runas"
   # Start the new process

   [System.Diagnostics.Process]::Start($newProcess)
   # Exit from the current, unelevated, process
   exit
 }
# Run your code that needs to be elevated here
do {
 sleep 1;
} while (-not (Unlock-Bitlocker -MountPoint "S:" -Password (Read-Host "Please enter password to unlock S: drive:" -AsSecureString)))