I am not actually sure if this is what you mean by messing up with the system but I think in installing the application, you just have to uncheck the option on installing the Google search bar. If it does not have a checkbox then you just have to change the homepage of their browser after finishing the installation for the school laboratory. There is a free version of the SU that you can download from the internet, see if it will do for your students. Chrysalis School Montana