According to Task Manager the CPU Usage is 100% but when I click on the "Processes" and sort by CPU in descending order I see that the process using the most CPU is taskmgr.exe at 02%. All the others are at 00%. So what's eating up all my CPU cycles?
The CPU is a Intel Core 2 Solo CPU U3500 @ 1.40GHz. So it's not a spectacular CPU but still... the behavior I'm seeing still doesn't make any sense.
Also, Aero is disabled.
Answer
Sorry, cannot yet comment. Windows update is know to sometimes cause 100% cpu usage. Click "show all processes" in taskmanager. If your notebook feels slow, see if svhost is at 100%, which would indicate Windows update is the fault. I think running it for a day or two fixed Windows update last time. If any other process is hang, try terminating it. If print spooler is at 100% restart the computer. If a virus is consuming all power, it may not show in the taskmanager.
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