in stead of Task Manager. Maybe this is unexpected. There are other alternatives, but let's start with a well-known one from Microsoft.
My laptop has Windows 7 x64 on it and I find that the fans run very loud usually (a direct sign of processor usage from my experience) and erratically ramp up and down when the laptop is not in use.
Now the strange part: opening task manager calms everything down and shows minimal CPU usage from this time on.
With no other changes, opening and leaving the task manager minimized keeps the fans quiet.
Is it possible that I have some program (virus/malware/remoteadmin/etc) running on my PC that "hides" by closing when task manager opens.
I have checked my startup applications and services and I see nothing abnormal.