my dad is having computer trouble and asked me to look at it. i did, and it seemed that it was running slow, i ran spybot, cleaned his registry, ran AVG. and it's going faster but still running slow. i checked his running processes and low and behold his System idle process is using 98-99% of the processor. i know the system idle does that when it's "idle" but it's using that much of the cpu ALL the time. what is the deal? should i just end the process? has it got a virus that's just not being picked up?