Starts given PowerShell commands in elevated Powershell process

Start-AsAdmin.ps1

#Requires -version 2.0

function Start-AsAdmin {
<#
    .Synopsis
    Starts given PowerShell commands in elevated Powershell

    .Description
    Runs given Powershell commands in elevated environment.

    .Parameter Command
    Powershell commands that require elevated environment

    .Parameter WindowStyle
    Makes elevated Powershell window visible or hidden

    .Example
    PS c:\> Start-AsAdmin -Command "Update-Help"

#>

    param (
            [Parameter(
                Mandatory=$true,
                HelpMessage='Powershell commands to be started as admin'
            )]
            [ValidateNotNullorEmpty()]
            [String]
        $Command
            , [ValidateSet('Normal', 'Hidden')]
            [Diagnostics.ProcessWindowStyle]
        $WindowStyle = 'Hidden'
    )

	$commandBytes = [Text.Encoding]::Unicode.GetBytes($command)
	$encodedCommand = [Convert]::ToBase64String($commandBytes)

	Start-Process -Verb RunAs -FilePath powershell.exe -ArgumentList "-ExecutionPolicy RemoteSigned -encodedcommand $encodedCommand" -Wait -WindowStyle $WindowStyle
}