Hello!

I'm not new to Linux or pen testing, but I am new to the Backtrack distro. A week or so ago I installed Backtrack 4 on my laptop at work, dual boot with Windows 7. The laptop is an HP Pavilion dv7. All was well until this morning, when I couldn't boot into either and was getting Grub error 22. I've tried googling and searching on these forums, but I haven't found anything specific to me.

I can boot from the live CD and mount /dev/sdb5 under /mnt.

Here is my output of fdisk -l:

# fdisk -l

Disk /dev/sda: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x485f5e16

Device Boot Start End Blocks Id System
/dev/sda1 * 1 26 203776 7 HPFS/NTFS
Partition 1 does not end on cylinder boundary.
/dev/sda2 26 58531 469939200 7 HPFS/NTFS
/dev/sda3 58531 60789 18136064 7 HPFS/NTFS
/dev/sda4 60789 60802 105496 c W95 FAT32 (LBA)

Disk /dev/sdb: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x766f69c2

Device Boot Start End Blocks Id System
/dev/sdb1 1 30401 244195008+ 7 HPFS/NTFS
/dev/sdb2 30402 60801 244188000 5 Extended
/dev/sdb5 30402 59670 235103211 83 Linux
/dev/sdb6 59671 60801 9084726 82 Linux swap / Solaris

Disk /dev/sdc: 8136 MB, 8136949760 bytes
255 heads, 63 sectors/track, 989 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x00000000

Device Boot Start End Blocks Id System
/dev/sdc1 * 1 987 7928046 6 FAT16

Any help is greatly appreciated!