Busy for nothing?

My comp have been busy for nuttin recently... hmm... i only notice this after i see one of my friends... haix... due to virus?? heres the capture... just look at the alarming CPU usage...

And all these happens when no applications are running.. except for the Windows Task Manager itself... the cause? virus? spyware? adware? bundler? no idea... i had scanned my comp... and return perfect results of no virus or so... hmm.. weird huh.. out~