hi , i have a windows7 os instaled, and i have a partition in my hdd, and i instaled windows xp in my second partition, work fine , but now when y reboot my computer, it goes directly to windows xp, and it doesent give me the option to choosse wich windows to boot, any idea how this happen? plaese help, i have evrithing in windows 7 and now i cant log in.(only in win xp).