Thanks John,

The RAM is DDR and a single 512 slice. MEMTEST86 runs on XP and ran clean for 18 hours. Sisoft Sandra ran burn in for 6 hours without a hitch. Started the card game spider and BSoD.

Just writing it down gave me relief. Actually getting some sympathy and advice made me fill up.

I will continue changing things but I am running out of bits to change. It's when you find yourself changing the pen you write the errors down with that you realise it's time to stop thinking and pick up your guitar and sing some.

All advice and sympathy welcome.

Spot (the shouldn'ta woke up this mornin) Dog