Hey guys, my C:\ drive sometimes makes one 'click' sound like its switching off, then my computer freezes. Its a WD 80gig SE (ide) that I purchased in April.I ran the WD diagnostic tool and it finds no problem. I 'm thinking maybe a power supply issue? I have an Enermax 460 PS, P4B 2.4, ATI 9700pro, 2x WD 80SE, benq DVD burner, lite-on DVD player, SB aud.2zs, 2x512 DDR 333, Gigabyte 8PE 667 ultra2 mobo, 3 case fans and a floppy drive. Basically, everything is 2.6 yrs old, except for the 2 HD's.Power scheme in windows for the HD's is 'always on', turn off HD's is 'never'.