I can't boot my laptop and I received this link, but I don't understand what to do

     Boot Info Script 0.61.full + Boot-Repair extra info [Boot-Info September 18th 2012]

============================= Boot Info Summary: ===============================

 => Syslinux MBR (3.61-4.03) is installed in the MBR of /dev/sda.
 => Syslinux MBR (4.04 and higher) is installed in the MBR of /dev/sdb.

sda1: __________________________________________________________________________

    File system: ext4
    Boot sector type: Unknown
    Boot sector info:
    Operating System:
    Boot files: /boot/grub/core.img

sda2: __________________________________________________________________________

    File system: Extended Partition
    Boot sector type: -
    Boot sector info:

sda5: __________________________________________________________________________

    File system: swap
    Boot sector type: -
    Boot sector info:

sdb1: __________________________________________________________________________

    File system: vfat
    Boot sector type: SYSLINUX 4.04 2011-04-18
    Boot sector info: Syslinux looks at sector 30632 of /dev/sdb1 for its
                       second stage. SYSLINUX is installed in the directory.
                       No errors found in the Boot Parameter Block.
    Operating System:
    Boot files: /syslinux/syslinux.cfg /ldlinux.sys

============================ Drive/Partition Info: =============================

Drive: sda _____________________________________________________________________

Disk /dev/sda: 80.0 GB, 80026361856 bytes
255 heads, 63 sectors/track, 9729 cylinders, total 156301488 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes

Partition Boot Start Sector End Sector # of Sectors Id System

/dev/sda1 * 63 150,336,269 150,336,207 83 Linux
/dev/sda2 150,336,270 156,296,384 5,960,115 5 Extended
/dev/sda5 150,336,333 156,296,384 5,960,052 82 Linux swap / Solaris

Drive: sdb _____________________________________________________________________

Disk /dev/sdb: 4026 MB, 4026531840 bytes
31 heads, 30 sectors/track, 8456 cylinders, total 7864320 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes

Partition Boot Start Sector End Sector # of Sectors Id System

/dev/sdb1 * 1,144 7,864,319 7,863,176 c W95 FAT32 (LBA)

"blkid" output: ________________________________________________________________

Device UUID TYPE LABEL

/dev/loop0 squashfs
/dev/sda1 d90a2262-e24d-490a-bf90-272836d8ced8 ext4
/dev/sda5 de01c33e-3eea-4c4f-a1af-062458e24f07 swap
/dev/sdb1 1BE6-1008 vfat PENDRIVE

================================ Mount points: =================================

Device Mount_Point Type Options

/dev/loop0 /rofs squashfs (ro,noatime)
/dev/sdb1 /cdrom vfat (ro,noatime,fmask=0022,dmask=0022,codepage=cp437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro)

=================== sda1: Location of files loaded by Grub: ====================

           GiB - GB File Fragment(s)

   0.495418072 = 0.531951104 boot/grub/core.img 1
   1.100074291 = 1.181195776 boot/initrd.img-2.6.31-23-generic 1
   1.202373028 = 1.291038208 boot/initrd.img-2.6.32-32-generic 1
   1.257480145 = 1.350209024 boot/initrd.img-2.6.32-33-generic 1
  23.909827709 = 25.672982016 boot/initrd.img-2.6.32-34-generic 2
   1.319968700 = 1.417305600 boot/initrd.img-2.6.32-35-generic 1
  34.054233074 = 36.565454336 boot/initrd.img-2.6.32-37-generic 2
  15.878573895 = 17.049488896 boot/initrd.img-2.6.32-38-generic 2
  19.796210766 = 21.256019456 boot/initrd.img-2.6.32-39-generic 2
  16.113074780 = 17.301282304 boot/initrd.img-2.6.32-40-generic 2
  24.112899303 = 25.891028480 boot/initrd.img-2.6.32-41-generic 1
  36.042354107 = 38.700183040 boot/initrd.img-2.6.32-42-generic 1
  55.503573895 = 59.596508672 boot/initrd.img-2.6.32-43-generic 2
   0.398196697 = 0.427560448 boot/vmlinuz-2.6.31-23-generic 1
   1.103835583 = 1.185234432 boot/vmlinuz-2.6.32-32-generic 1
   1.019416332 = 1.094589952 boot/vmlinuz-2.6.32-33-generic 1
   1.429671764 = 1.535098368 boot/vmlinuz-2.6.32-34-generic 1
   1.269420147 = 1.363029504 boot/vmlinuz-2.6.32-35-generic 1
   4.063441753 = 4.363087360 boot/vmlinuz-2.6.32-36-generic 1
   5.685409069 = 6.104661504 boot/vmlinuz-2.6.32-37-generic 1
   5.655150890 = 6.072172032 boot/vmlinuz-2.6.32-38-generic 1
  14.104045391 = 15.144103424 boot/vmlinuz-2.6.32-39-generic 1
  14.121066570 = 15.162379776 boot/vmlinuz-2.6.32-40-generic 1
   0.133208752 = 0.143031808 boot/vmlinuz-2.6.32-41-generic 1
  30.080890179 = 32.299109888 boot/vmlinuz-2.6.32-42-generic 1
  32.058703899 = 34.422771200 boot/vmlinuz-2.6.32-43-generic 1
  55.503573895 = 59.596508672 initrd.img 2
  36.042354107 = 38.700183040 initrd.img.old 1
  32.058703899 = 34.422771200 vmlinuz 1
  30.080890179 = 32.299109888 vmlinuz.old 1

========================= sdb1/syslinux/syslinux.cfg: ==========================

--------------------------------------------------------------------------------
# D-I config version 2.0
include menu.cfg
default vesamenu.c32
prompt 0
timeout 50

# If you would like to use the new menu and be presented with the option to install or run from USB at startup, remove # from the following line. This line was commented out (by request of many) to allow the old menu to be presented and to enable booting straight into the Live Environment!
# ui gfxboot bootlogo
--------------------------------------------------------------------------------

================= sdb1: Location of files loaded by Syslinux: ==================

           GiB - GB File Fragment(s)

            ?? = ?? ldlinux.sys 1
            ?? = ?? syslinux/syslinux.cfg 1
            ?? = ?? syslinux/vesamenu.c32 1

============== sdb1: Version of COM32(R) files used by Syslinux: ===============

 syslinux/vesamenu.c32 : COM32R module (v3.xx)

======================== Unknown MBRs/Boot Sectors/etc: ========================

Unknown BootLoader on sda1

00000000 ed 41 00 00 00 10 00 00 28 68 67 50 49 f9 03 4e |.A......(hgPI..N|
00000010 b5 af e8 4a 00 00 00 00 00 00 02 00 08 00 00 00 |...J............|
00000020 00 00 08 00 01 00 00 00 0a f3 01 00 04 00 00 00 |................|
00000030 00 00 00 00 00 00 00 00 01 00 00 00 39 24 00 00 |............9$..|
00000040 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
00000060 00 00 00 00 be e0 59 38 00 00 00 00 00 00 00 00 |......Y8........|
00000070 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
00000080 1c 00 00 00 bc dc 3e 0b 00 00 00 00 ac 2c 05 54 |......>......,.T|
00000090 a0 f8 03 4e 6c a9 a5 e9 00 00 00 00 00 00 00 00 |...Nl...........|
000000a0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
00000100 ed 41 00 00 00 10 00 00 28 68 67 50 49 f9 03 4e |.A......(hgPI..N|
00000110 28 83 dc 4a 00 00 00 00 00 00 02 00 08 00 00 00 |(..J............|
00000120 00 00 08 00 01 00 00 00 0a f3 01 00 04 00 00 00 |................|
00000130 00 00 00 00 00 00 00 00 01 00 00 00 3a 24 00 00 |............:$..|
00000140 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
00000160 00 00 00 00 bf e0 59 38 00 00 00 00 00 00 00 00 |......Y8........|
00000170 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
00000180 1c 00 00 00 bc dc 3e 0b 00 00 00 00 54 e7 1c 52 |......>.....T..R|
00000190 a0 f8 03 4e 6c a9 a5 e9 00 00 00 00 00 00 00 00 |...Nl...........|
000001a0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
00000200

ADDITIONAL INFORMATION :
=================== log of boot-repair 2012-10-07__17h16 ===================
boot-repair version : 3.193-0ppa23~lucid
boot-sav version : 3.193-0ppa40~lucid
glade2script-gtk2 version : 0.0.1-0ppa4~lucid
boot-sav-nonfree version : 3.18-0ppa20~lucid
0 upgraded, 0 newly installed, 1 reinstalled, 0 to remove and 294 not upgraded.
dpkg-preconfigure: unable to re-open stdin:
boot-repair is executed in live-session (Ubuntu 10.04.3 LTS, lucid, Ubuntu, i686)
CPU op-mode(s): 32-bit
file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash -- BOOT_IMAGE=/casper/vmlinuz
/grub detected inside a Linux partition. Rename /mnt/boot-sav/sda1/grub into grub_old
sudo: cannot get working directory

=================== os-prober:
/dev/sda1:unknown Linux distribution:Linux:linux

=================== blkid:
/dev/loop0: TYPE="squashfs"
/dev/sda1: UUID="d90a2262-e24d-490a-bf90-272836d8ced8" TYPE="ext4"
/dev/sda5: UUID="de01c33e-3eea-4c4f-a1af-062458e24f07" TYPE="swap"
/dev/sdb1: LABEL="PENDRIVE" UUID="1BE6-1008" TYPE="vfat"

1 disks with OS, 1 OS : 1 Linux, 0 MacOS, 0 Windows, 0 unknown type OS.

mkdir: cannot create directory `/mnt/boot-sav/sda1/var/log': File exists
sda1 is Read-only or full
=================== dmesg | grep EFI :
This live-session is not EFI-compatible.

=================== PARTITIONS & DISKS:
sda1 : sda, not-sepboot, grubenv-ok nogrub, no-docgrub, no-update-grub, 32, with-boot, is-os, not--efi--part, part-has-no-fstab, part-has-no-fstab, no-nt, no-winload, no-recov-nor-hid, no-bmgr, notwinboot, nopakmgr, nogrubinstall, no---usr, part-has-no-fstab, not-sep-usr, standard, not-far, /mnt/boot-sav/sda1.

sda : not-GPT, BIOSboot-not-needed, has-no-EFIpart, not-usb, has-os, 63 sectors * 512 bytes

=================== parted -l:

Model: ATA FUJITSU MHV2080B (scsi)
Disk /dev/sda: 80.0GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number Start End Size Type File system Flags
1 32.3kB 77.0GB 77.0GB primary ext4 boot
2 77.0GB 80.0GB 3052MB extended
5 77.0GB 80.0GB 3052MB logical linux-swap(v1)

Model: Generic Flash Disk (scsi)
Disk /dev/sdb: 4027MB
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number Start End Size Type File system Flags
1 586kB 4027MB 4026MB primary fat32 boot, lba

=================== parted -lm:

BYT;
/dev/sda:80.0GB:scsi:512:512:msdos:ATA FUJITSU MHV2080B;
1:32.3kB:77.0GB:77.0GB:ext4::boot;
2:77.0GB:80.0GB:3052MB:::;
5:77.0GB:80.0GB:3052MB:linux-swap(v1)::;

BYT;
/dev/sdb:4027MB:scsi:512:512:msdos:Generic Flash Disk;
1:586kB:4027MB:4026MB:fat32::boot, lba;

=================== mount:
aufs on / type aufs (rw)
none on /proc type proc (rw,noexec,nosuid,nodev)
none on /sys type sysfs (rw,noexec,nosuid,nodev)
none on /dev type devtmpfs (rw,mode=0755)
none on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
/dev/sdb1 on /cdrom type vfat (ro,noatime,fmask=0022,dmask=0022,codepage=cp437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro)
/dev/loop0 on /rofs type squashfs (ro,noatime)
none on /sys/fs/fuse/connections type fusectl (rw)
none on /sys/kernel/debug type debugfs (rw)
none on /sys/kernel/security type securityfs (rw)
none on /dev/shm type tmpfs (rw,nosuid,nodev)
tmpfs on /tmp type tmpfs (rw,nosuid,nodev)
none on /var/run type tmpfs (rw,nosuid,mode=0755)
none on /var/lock type tmpfs (rw,noexec,nosuid,nodev)
none on /lib/init/rw type tmpfs (rw,nosuid,mode=0755)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,noexec,nosuid,nodev)
gvfs-fuse-daemon on /home/ubuntu/.gvfs type fuse.gvfs-fuse-daemon (rw,nosuid,nodev,user=ubuntu)
/dev/sda1 on /mnt/boot-sav/sda1 type ext4 (rw)

=================== ls:
/sys/block/sda (filtered): alignment_offset bdi capability dev device ext_range holders inflight power queue range removable ro sda1 sda2 sda5 size slaves stat subsystem trace uevent
/sys/block/sdb (filtered): alignment_offset bdi capability dev device ext_range holders inflight power queue range removable ro sdb1 size slaves stat subsystem trace uevent
/sys/block/sr0 (filtered): alignment_offset bdi capability dev device ext_range holders inflight power queue range removable ro size slaves stat subsystem trace uevent
/dev (filtered): adsp agpgart audio block bsg btrfs-control bus cdrom cdrw char console core cpu_dma_latency disk dri dsp dvd dvdrw ecryptfs fb0 fd full fuse hpet input kmsg log mapper mcelog mem mixer net network_latency network_throughput null oldmem pktcdvd port ppp psaux ptmx pts random rfkill rtc rtc0 scd0 sda sda1 sda2 sda5 sdb sdb1 sequencer sequencer2 sg0 sg1 sg2 shm snapshot snd sndstat sr0 stderr stdin stdout urandom usbmon0 usbmon1 usbmon2 usbmon3 usbmon4 usbmon5 vga_arbiter zero
ls /dev/mapper: control

=================== df -Th:

Filesystem Type Size Used Avail Use% Mounted on
aufs aufs 497M 98M 399M 20% /
none devtmpfs 492M 280K 492M 1% /dev
/dev/sdb1 vfat 3.8G 695M 3.1G 19% /cdrom
/dev/loop0
squashfs 661M 661M 0 100% /rofs
none tmpfs 497M 360K 497M 1% /dev/shm
tmpfs tmpfs 497M 28K 497M 1% /tmp
none tmpfs 497M 88K 497M 1% /var/run
none tmpfs 497M 0 497M 0% /var/lock
none tmpfs 497M 0 497M 0% /lib/init/rw
/dev/sda1 ext4 71G 52G 16G 77% /mnt/boot-sav/sda1

=================== fdisk -l:

Disk /dev/sda: 80.0 GB, 80026361856 bytes
255 heads, 63 sectors/track, 9729 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x94e494e4

Device Boot Start End Blocks Id System
/dev/sda1 * 1 9358 75168103+ 83 Linux
/dev/sda2 9359 9729 2980057+ 5 Extended
/dev/sda5 9359 9729 2980026 82 Linux swap / Solaris

Disk /dev/sdb: 4026 MB, 4026531840 bytes
31 heads, 30 sectors/track, 8456 cylinders
Units = cylinders of 930 * 512 = 476160 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xf3ed644d

Device Boot Start End Blocks Id System
/dev/sdb1 * 2 8457 3931588 c W95 FAT32 (LBA)

=================== Recommended repair
Recommended-Repair
This setting will restore the [(generic mbr)] MBR in sda, and make it boot on sda1.
Additional repair will be performed: unhide-bootmenu-10s

Will restore the MBR_TO_RESTORE : sda (generic mbr) into sda
dd if=/usr/lib/syslinux/mbr.bin of=/dev/sda
0+1 records in
0+1 records out
parted /dev/sda set 1 boot on

Information: You may need to update /etc/fstab.

sudo: cannot get working directory

Boot successfully repaired.

You can now reboot your computer.

pastebinit packages needed
E: Package pastebinit has no installation candidate
dpkg-preconfigure: unable to re-open stdin: