Roberto - We had a similar problem on 5.5 with InnoculateIT. We would stop the services but still see the poor performance. Once we uninstalled the virus scanning software, the problem went away. You might want to try that. You can always purchase a different virus scanning software - Antigen you can download online (www.sybari.com). I've had good luck with it. Not sure if this will help but thought I would try... -Alex