I just installed a completely fresh windows 7. I wiped and formatted the hard drive prior to installation. For some reason the install took like 7 hours. And afterwards, it still runs horrifically slow. I checked task manager and it shows my CPU usage at 100%. I checked applications and processes, and there are very few there, and all are between 2-8% CPU usage. I'm not very tech savy so I'm just going by the number shown under the CPU column in the Processes tab. Also it says there are 33-35 processes running, even though it only lists about 8 in the task manager. I've only installed 2 things since I installed windows 7, and those are google chrome and microsoft security essentials. Before someone says that either of those 2 could be the problem, they were installed afterwards, and it was slow and laggy before then. Windows has supposedly updated all the stuff it needed to because it restarted and updated a number of times, and I'm no longer getting update messages.
I'm using an Intel(R) Core(TM)2 CPU E7500 @ 2.93GHz with 4 gigs of ram.