Hmmmmmmmmmmm,

Not too sure (it is early yet, and the caffeine hasn't kicked in) Is this a general problem, or is more noticeable when you first start the machine?

I do wonder about just migrating HDDs with XP, as it does not seem to be as simple as it was with earlier operating systems. Did you re-activate it?

Also, is this an older HDD that is giving the slow performance?.............have you booted into setup and checked that it is being properly recognised?

Cheers