Automation / Macro Solution / windows xp and higher

I have a automation process that I currently use a macro for. Im looking for someone to make a new macro that runs on its own. I currently use quickmacros.com. However, it uses the mouse and keyboard functions and will not allow me to switch windows user accounts without it stopping I need the macro to run in the background or atleast allow me to switch windows user accounts for xp and higher without the macro stopping.( Therefor i can make the macro run on each windows user account I have created) The macro logs onto an application and completes a series of tasks and then logs out and then logs in to another name in the variable names list and does the process again.