100 percent cpu. How do I stop this?

[Love And Submission]

Well I'm incredibly confused right now because my CPU is constant5ly at a hundred percent. Now I've seen a hunrded percent cpu usage but I'm currently using a programming called process tamer to limit my cpu usage and it still appears to be nothing.
Originally I was using Task Manager to do the same thing but that didn't work either.

Is there a program that will allow me to see everything using my CPU? It has to be some invisible process because the ones shown simply don't add up to a hundred percent.

[wxiyn]

Maybe you can try Process Explorer. I can not post a link here. Just google it, and be careful to download it from Micro$oft website.

[Vekseid]

Process Explorer is nice because it also shows threads, which can reveal subsystem usage, which isn't always easily seen by the task manager.