Thank you for your reply and suggestions. As you suspected all remedies you suggested had already been tried. Since posting I have upgraded my motherboard, cpu, memory, 32 bit to 64 bit windows 7. So it is now what you call a clean machine. Unfortunately, the C4 showed the same behaviour. My notebook which is Windows 8 Pro does recognise the C4 but intermittently gets booted off the drive chain during the copy process. I suspect that it has a dodgy usb port and has now been sent back to the distributer.
Sorry to hear this friend but IDD That its surely a faulty C4 U got which is surprising indeed.
I hope this doesn't put U off of the C4's because when you do get to hear your new 1 after burning in process completes I'll wager after listening to a nice uncompressed Flac or Wav that you'll have a big grin on your face for sure
So I hope things work out for you.