PS_ElevateAdmin

##AH - Adil Hindistan - Self Elevating Script

# http://rkeithhill.wordpress.com/2013/04/05/powershell-script-that-relaunches-as-admin/

function IsAdministrator
{
    $Identity = [System.Security.Principal.WindowsIdentity]::GetCurrent()
    $Principal = New-Object System.Security.Principal.WindowsPrincipal($Identity)
    $Principal.IsInRole([System.Security.Principal.WindowsBuiltInRole]::Administrator)
}


function IsUacEnabled
{
    (Get-ItemProperty HKLM:\Software\Microsoft\Windows\CurrentVersion\Policies\System).EnableLua -ne 0
}


# Main script
#
if (!(IsAdministrator))
{
    if (IsUacEnabled)
    {
        [string[]]$argList = @('-NoProfile', '-NoExit', '-File', $MyInvocation.MyCommand.Path)
        $argList += $MyInvocation.BoundParameters.GetEnumerator() | Foreach {"-$($_.Key)", "$($_.Value)"}
        $argList += $MyInvocation.UnboundArguments
        Start-Process PowerShell.exe -Verb Runas -WorkingDirectory $pwd -ArgumentList $argList 
        return
    }
    else
    {
        throw "You must be administrator to run this script"
    }
}

## One liner to check for admin & quit if not
if (-not ([Security.Principal.WindowsPrincipal] [Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole] "Administrator")) { write-error "You must run this script from an Administrator PowerShell instance"; return }