In Layman terms.....It was the Firewire IEEE1394 OCHI Compliant Host controller,I disabled it in device manager and CPU useage dropped 30+ percent.
I read that DPC's and Sys Interrupts run after higher piority calls have been handled, as I dont use firewire...You get my drift.
AS it was,My system would run fine 15% CPU useage then hours later jump up to 50% plus.
I disabled devices not in use like COM ports, floppy,etc. and eventually Firewire, rather than messing with my drivers.
When I do use the port, its easy to reenable and then I don't get any problems,as the port is in use. Hope this helps someone.
985 days no posts, like the problem just went away.