So what's likely the cause of such behavior? A bad driver? Any way to find out which? Clearly, based on how sluggish my system is the CPU is at 65% even though the process window shows only the idle ...

An option in the Windows XP Task Manager that indicates what percentage of time the CPU is currently doing nothing but waiting for work. If no applications are running that the user is aware of ...

This is an undesirable program. This file has been identified as a program that is undesirable to have running on your computer. This consists of programs that are misleading, harmful, or undesirable.

If I goto the task manager it says there is a process called "system idle process" and it is always at 95-100% cpu usage. However, if I look at the graph of cpu usage it shows that it is only at like ...