Right, thanks to alot of research and alot of Hexus help I have finally got my new rig together.
Trouble is that sometimes on startup the system boots,registers memory, hard drives controllers etc and then before it gets to the Windows XP splash screen I get a black screen with a few dots and thats where it stays, If I then restart it will usually startup OK. Now I have been applying a mild overclock on my 8400 (3.0 - 3.2) by purely upping the FSB. The RAM is way under its rated speed and I have a Scythe Mine cooler so everything is nice and cool. And it's only intermittent.
So............I thought I would update the Bios (which is currently 1.5 and 1.8 is available) and a fix in 1.8 does relate to the 8400 in some way ('S3' I think) So I have downloaded the bios from MSI's site
and the instructions seem to point at creating a Dos boot floppy - err I don't have a floppy drive.
OK next step I tried MSI's 'liveupdate' solution - and that just goes over and over with a loading bar
Can anyone please give me any hints - can I use a usb stick instaed of a floppy disk - and how does that work? It is AMI bios if that makes a difference.