Well I tried the new bios, but it had no effect :-(
My system still keeps freezing......... I now know it's not due to overclocking the processor anymore (I changed from a duron to a TBird AXIA 1.2).
I also read the kt7a faq another time, took out all add in cards and then tried just sound in slot 3......... My system knows the sound card is in there but is unable to playback. So I then replaced the !live with my nic and reinstalled from scratch, very odd....the system knows there's a nic there but can't find the driver for it in windows, in any other slot it installs perfectly!
This led me to believe that it's the mobo at fault, phoned overclock.co.uk explained the problem, the bloke thought exactly the same as me & are going to swap it asap.
The chap on the phone was really good about it, for once I'm impressed with customer service I've received!!!!!!
I've said sorry to my SB!Live, I shall not swear at it quite so loudly again, hope it forgives me ;-)