[Murt]

Thanks for the advice.
I am using 2 separate hard drives, 160G for system 320G for audio, both Seagate.
LE7.4 with Ignition pack free plug ins, Asus P5K VM motherboard,2G RAM, Intel integrated graphics controller video card, Marvell semiconductor yukon 88E8056 PCI-E network card, Windows XP Home with SP2. I did speak to the PC manufacturer yesterday and they suggested it may be the motherboard.