hi, i have a windows xp, i have put in a new 540 power supply. about 6 months ago someone divided the C and D drive wrong, the gave more space on the C drive than the D drive. i want to reset my pc from scratch. i have been told i need to go to the bios page. i have no idea where to start. can someone please advise me step by step on how to reboot/ reset my pc so that i can reinstall all the software etc. coz he has messed up my pc big time. if someone goes through it with me i would be very greatful as i have tried reading in some books and didnt find what i needed. thank you in advance.