Thanks Dave, yeah I am a bit stubborn, don't like things beating me, so I am like a dog with a bone. Still cost me for my tech mate to do a rebuild which in hindsight was not necessary as I can do that myself, but I thought it may have been something a bit more sinister initially, which would have been a bit above my pay grade to deal with. So if anybody here is getting BSOD and they have MWB installed, it is almost certainly the cause.
Thanks for all your help and suggestions.
