OT: Computer based pre-amp question

[<mike@michaelplishka.com>]

I bought a M-Audio mobilepre to use with my HP Pavilion laptop and 
RealBand 
and Band-in-a-box from PGmusic. Anyway, first installed and everything was 
AWESOME!! Great sound for the first couple of takes. Then, crackling. It 
doesn't get worse it stays the same and sometimes is there, sometimes not. 
When I move the mouse over the page the crackling responds to it.

First time it did this I found the internal sound card was deactivated. I 
reactivated and voila! crackle gone....for one song..then it came back.

Any ideas? Is this a windows based issue? It's an AMD Turion X2 processor 
with Windows Vista.

Thanks!

~peace~

Plish