I have a recurring problem on my laptop. The cpu usage is usually around 70-100% even though no demanding programs are on. Furthermore, system idle has the highest cpu usage under the task manager. Another bizarre thing is that, when I disable my usb drivers the usage drops to 30%, this makes the laptop usable, but it still hangs from time to time. I tried reinstalling but with no avail. I'm not sure what else I can tell, but it would be great if someone knew anything about this.