CPU busy.

Hi All On several occasions I have noticed that for no apparent reason the CPU is extremely busy. The system monitor shows "0%idle" even after I closed down all the running programs. I left it for a couple of hours (thinking its cleaning up something) but still busy. The only way to get rid of it is reboot comp Does anyone know what causes this or how to check what the comp is doing? Would it have to do with the kernel ? I'm using SuSE 8.1. TIA -- /bill from 169 west 19 south (where the hell is that?) Registered Linux user #298909 http://counter.li.org