Been thinking must be a fault on PCI slots, ok when unused, plonk a card in and the whole machine porked, gonna try a different motherboard in tomorrow. Have found the drivers that work this modem by a system of elimination, stuck it in my machine and went thru all the ,modem drivers on the disk, what a bastard, found one that works it ok.. .Hopefully got its back broke now, fingers crossed for tomorow.