Why does task manager always show CPU usage at 100%? It's

Tentaphane

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Hi!

I bought a new desktop last year to run high-end software used for my degree; I installed Windows 8 on it, having got on with it on my laptop. I did notice though, after venturing into the Task Manager, that my CPU usage was at 100%. All the time. Even when idle. In fact, resource monitor says it's working at 108% load! I thought this was rather odd, so investigated further:

It appears that task manager divides the 100% usage proportionally between the processes using the CPU. So for example if Firefox, Word and Notepad were using 5%, 3% and 2% respectively, Task Manager would report 50%, 30% and 20% usage. I was initially concerned that my processor was going to take some serious damage to its life expectancy if it was being constantly loaded - but the performance monitor in Norton Anti-virus shows the CPU load to be much, much lower - where I'd expect it to be.

My system is an 3.4GHz i7, with 16GB RAM running 64-bit Windows 8 Pro. People have suggested a fresh install, but it's an almighty pain backing everything up and re-installing VPN servers and software through various security measures, so I'd rather not...

Any clues?
 

My Computer

System One

  • OS
    Windows 8 Pro
    Computer type
    PC/Desktop
    System Manufacturer/Model
    PC Specialist
    CPU
    Intel i7-3770
    Motherboard
    ASUS® P8Z77-V
    Memory
    16GB Kingston Hyper-X Genesis Dual-DDR3 1600MHz
    Graphics Card(s)
    2GB NVIDIA GEFORCE GTX 670
    Browser
    Firefox
    Antivirus
    Norton 360
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