win 2000

i have win 2000 advanced server in the event viwer i have to errors:
in system log ,the type:error source:w32time
this machine is a PDC of the domain at the root of the forest.Configure to sync from external time source using the net command,’net time /setsntp:‘.
So what is this log mean?

the second one
in athe application log
type:error source:perfctrs
unable to read IO control information for NBT
device.

Pls :advice me for this two log