I dual boot my computer and later decided to delete one of the Ubuntu partitions while using Windows 7. After my computer hibernated and I tried restarting my ASUS laptop it stopped at the logo and preventing me from entering the BIOS. When I take out my hard dive it allows me to enter the BIOS. It does not boot from a CD if the hard drive is still attached to the computer. After taking the hard drive out then it boots from the CD. Can someone please help?