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 ...

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 ...

The Deferred Procedure Calls and Interrupt Service Routines is a mechanism in your Windows computer that will defer tasks of lower priority to a time suitable and simultaneously prioritize high ...