As someone said before, you must have something running, like a service, perhaps a crashed service, that is using up to 30% of your CPU, and all that mem. OK, I've 4GB of ram, but right now, my CPU usage is at 0-3 % and i'm using MSN Live messenger and IE 7 with just under 3GB of ram spare. Your tab also states is using loads of RAM for caching. This stops when an application needs it. But yeah, you definatelt need something looked at if it's thats high. On CPU usage too.