Vista - Clicking sound while scrolling

Yeah, I just tested it with a mouse connected via usb, it still happens.

Have you booted into safe mode to verify its not a program causing this?

Tested both safe mode and safe mode w/ network. While decreased, it is still there. I'm more and more convinced it's a motherboard interference issue.

I asked a harddrive supporter and he said that some HDD even from the same brand could be more or less noisy when in working mode.

But if that smooth scrool dident work then im out of clues.

Makes sense. I run Active Hard Disk Monitor in the background and everything checks out. I'll just leave it as a nuisance.

My parents XP machine always, and I literally mean always have some kind of HDD activity going on so I doubt its a real problem

There is another way to lower the HHD noise. Under controlepanel and administration there is a way to disable some windows aplications that runs pretty much always, and thats why your HHD react more noisy. But unless you dont know what each aplication does then i would not suggest that

There is HDD index and some HHD scans of any sorts that runs. But it could make the system unstable or slower. But hey..if you want lower noise then go for it.