system hangs momentarily every 4 mins 2 secs

[tom arnall <kloro2006@gmail.com>]

My system hangs momentarily every 4 mins 2 secs. The event coincides with 
a 'top' entry in which 'events/0' grabs 50-95% of cpu capacity. How can I 
determine what is causing the event?

Thanks,

Tom Arnall
north spit, ca