hi thanks very much to both of you for your insightful input.
Sorry for the late reply but I havent looked here for a while.
I solved the problem a few days after my last post, it turned out to be a simple problem.
However it caused me needlessly to flash my mb bios
After flashing the problem still remained
I decided that i should have a look at the internal components of my machine.
All it was in the end was that I had left the ide ribbon cable connected to a harddrive and had disconnected its molex power connector
Obviously not good and was messing with the bios probably.
Luckily I got away with this risky flashing business, which even the mb manufacturers say that you shouldn't do unless you have to.
This silly mistake was made because i had been messing with trying to load 2 XPs and ubuntu for about 2 days solid, and was understandably getting quite frustrated.
Anyway thanks again.