Busy CPUs w/no active processes
I have a computer with 4 Gigs Ram, 6 hard drives in a Raid Config, with 2 PIII 1GHz CPUs. (Currently running Win XP, but trying to load small business server 2003.)
When I start it up it runs fine, but after about 5 minutes idling (or not idling, but idling makes it easiest to see) the cpus start running 40% and 60% busy, and the thing bogs down.
Interestingly, if I restart it without any delay, the same thing happens again: it runs fine for a bit, then the two processors go to 40% and 60% busy -- so heat does not seem to be the problem.
Any ideas why? MOBO? CPUs? Operating System?
Thanks in advance for any ideas.