Thanks for your feedback guys.
For the kit items effected by the USB connection I think i'll just pull out the USB cables during recording. Good enough I suppose.
Changing the Gain on the monitors unfortunately makes no difference.
The Soundcard is the bugger.
I might try an outboard USB hub and see if that makes a difference for the soundcard.
I've no idea about power grounding etc.. with my home, wouldn't know where to look or what to look out for.
more or less a brand new PC, perhaps I should have got one of those PC's specific for Music making
http://www.carillondirect.com/clnweb...jsp?country=UK
How does one know when to use balanced or unbalance audio jacks