I installed Ubuntu yesterday via a bootable USB drive, created with unetbootin. Everything went very well, but now the computer does not boot unless the USB drive is plugged in. If it's not, then when the computer boots, the boot sequence screen just appears and if I select the hard drive, it will just reboot and go back to this boot sequence screen, until I plug in the USB drive.
Any ideas? Thanks a lot for your help!
UPDATE: Having some valuable data on the machine, I would prefer a solution that doesn't involve reinstalling, but from the first replies, I guess this may be what I have to do eventually. Thanks!
EDIT: output of sudo fdisk -l below
Disk /dev/sda: 750.2 GB, 750156374016 bytes 255 heads, 63 sectors/track, 91201 cylinders, total 1465149168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x000742dc Device Boot Start End Blocks Id System /dev/sda1 2048 1449474047 724736000 83 Linux /dev/sda2 1449476094 1465147391 7835649 5 Extended Partition 2 does not start on physical sector boundary. /dev/sda5 1449476096 1465147391 7835648 82 Linux swap / Solaris Disk /dev/sdb: 4009 MB, 4009754624 bytes 255 heads, 63 sectors/track, 487 cylinders, total 7831552 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0xc3072e18 Device Boot Start End Blocks Id System /dev/sdb1 * 8064 7831551 3911744 b W95 FAT32
EDIT2 bootinfo output: http://paste.ubuntu.com/1006423