Hi all, I properly installed Windows 7 (64-bit) on my Lenovo laptop that was initially running a 64-bit version of Windows Vista. Everything went very smoothly. However, windows would not boot without the installation CD in the drive. All I get is a black screen with a white cursor space (kind of DOS style). No pop up message, nothing. Then if I put the CD back inside and switch the laptop off and on again it works. Can someone help me with this? Thanks!