I am trying to reformat a Portege p3500 for my brother's g/f. I have an external usb dvd drive and a copy of XP ready to go. The problem is I cannot get into the stupid bios. I hit esc, during the toshiba boot screen and get the following message. "check system. Press F1" when I press F1 it just goes right back to the toshiba boot screen and from there loads xp. I have looked other places on-line and supposedly pressing F1 accesses the BIOS. Doesn't seem to work for me. I am stuck please help