I'm having some problems with my internet going down. After I refresh my IP it will come back up. I talked with my ISP and was told that I was blocked because my usage was high and it looked like I was using applications that would refresh my IP too often (campus like connection so they can do that). He said this could come from using an application like limewire or a worm or a virus. This all started on my last Imac. The only apps I used that would connect to the internet were safari and itunes. I use netflix and hulu often, but those are the only high bandwidth sites I would use. It has continued on my current Imac. What could be causing that from my end? Is there a virus or worm scan that I can run? Thanks guys.