i had installed windows XP and windows 7 on my new pc. then now i updated XP to service pack 3 (i earlier had XP service pack 1). The problem is when i boot my computer, it boots directly into windows xp, it does not show the windows 7 option!!!! What can i do to get back the windows 7 alongwith windows XP when i boot my computer???? Please help me!!!!!!!