Hi toni
just like to say have you got a spare XP cd - you would need to reinstall XP - but you can try doing other things before this I.E. system restore or Using Last Know Good Configuration -
as for BIOS i will tell you but do not adjust anything in there since it is nothing to do with the above issue - if you change something and you do not know what you have done - you can stop your machine from even booting up - when switching on your machine press F5 continuosly if that does not work restart your machine and try pressin DEL key repeatidly - hope that helps any more Q's let me know
Bally1981
January 2008