areyou recording through the LINE-in on the back of your computer?
if so, make sure your computer's internal mixer is all muted under the recording option, EXPECT for the "line-in" if youre doing it that way...
is the meter telling you, that there is noise? or do your ears, because if you have the dB level meter set(in adobe) to (hmm i forget but i think) -126 view, you will see some action up to about -60 even when not recording, i get that when i record into my edirol UA1a
via usb even....however i hear nothing when i just record the silence... -60dB is very quiet...i reckon
hope this helps