I think it would be helpful if I gave you an overview of the office. Attached is a picture of the network. Every now and then, some computers will have problems and run slow. I usually end up using system restore to get them up and running again. Is there anything that you guys could recommend to assist me in preventing any system changes for all of the computers? I would like for the computer to be only able to update BitDefender Internet Security. By the way, it is a physicians office and most of the work is done through CernerWorks. It is a web based program that everyone logs into and uses a Citrix Client and Uniprint to work. Also, should I turn off any services to maximize the efficiency of the computers? Thanks.