I had XP Professional running on my computer . When i used to start my comp , it wud show " Invalid boot.ini Booting from C:\ " and it wud start normally. Then I Installed Windows 7 beta , which was already expired . After installation , XP dint boot at all . I tried Putting XP as the default OS under startup and recovery section of My Computer Properties , but XP is not listed there. Plz help me , i am also ready to delete Windows 7. Thanx in Advance.