We have a Windows XP Pro workstation with a problem. After every boot up it looks as though a installer program is trying to run. The Windows Installer screen flashes about every secord or so and says "Preparing to Insall" over and over again and never stops. It is not a virus program, we did a scan of the system. I ran the task manager and msconfig and stopped selective programs from starting but it wont stop. I am running out of ideas.