How can I start a batch script before logging in?

If you have Windows 8 Pro, open the search charm for apps using +Q, type gpedit.msc and open the Local Group Policy Editor.

• Under Computer Configuration / Windows Settings you'll find Scripts (Startup/Shutdown)

• Under User Configuration / Windows Settings you'll find Scripts (Logon/Logoff)

Specify your batch file or PowerShell script here.