Hi, I have same problem. Suddenly my IIS begin to serve images very slow. I have CF7 services stopped. When I read that you have CF7 too, I suppose that be a connection or relationship between CF7, IIS and problem. Can you try to change the status of your CF services ? I start and stop CF services and the problem dissapear...yes, I don't know what happend, may be something inside a IIS metabase... I will try to inspect more. I hope this help you. regards -gabriel