Hi, thanks for your reply.
However, as I said, I cant disable USB 3 as I need it for a new drive which is on its way. I couldnt get past the locking up so I went out and bought a Dynamode USB 3.0 PCI-E card which doesnt cause the problem. I shouldnt have to rely on 3rd party cards but needs must!
Thanks again though and happy new year!
Rich