add info re: redownload of script

Author: mestew

articles/security/quick-encrypt-vm-powershell.md

@@ -24,10 +24,12 @@ If you don't have an Azure subscription, create a [free account](https://azure.m
 
 - Windows PowerShell ISE
 - Install and configure the [latest version of Azure PowerShell](/powershell/azure/install-azurerm-ps)
-- A copy of the [Azure Disk Encryption prerequisites script](https://raw.githubusercontent.com/Azure/azure-powershell/master/src/ResourceManager/Compute/Commands.Compute/Extension/AzureDiskEncryption/Scripts/AzureDiskEncryptionPreRequisiteSetup.ps1 )
+- A copy of the [Azure Disk Encryption prerequisites script](https://raw.githubusercontent.com/Azure/azure-powershell/master/src/ResourceManager/Compute/Commands.Compute/Extension/AzureDiskEncryption/Scripts/AzureDiskEncryptionPreRequisiteSetup.ps1).
+    - If you have this script already, download a new copy as it has recently changed. 
     - Use **CTRL-A** to select all the text then use **CTRL-C** to copy all the text into Notepad.
     - Save the file as **ADEPrereqScript.ps1**
 
+
 ## Sign in to Azure
 
 1. Right-click **Windows PowerShell ISE** and click **Run as administrator**.