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I have just installed Ubuntu 13.04, yet I had problems getting into any of the systems after installation [I had Windows 7 installed before].

The problem is, that after installation and restart, I didn't get the option to boot Ubuntu, only previous Windows Vista [which I replaced with Ubuntu] and Windows 7. I was trying to repair the boot option via Windows's EasyBSD or whatever was it called, then after restart, I had two options - Windows Vista and Ubuntu. Neither worked - Vista has been deleted and replaced by Ubuntu and 'Ubuntu' option was somehow wrongly set.

Now, I have two systems installed and I cannot run neither of them, so I'm using LiveCD. Is here anybody who'd tell me exactly what am I ought to do? I'm literally lost...

Thanks.

Edit: sudo fdisk -l output:

Disk /dev/sda: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 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: 0x7c12e647

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *          63  1729975589   864987763+   7  HPFS/NTFS/exFAT
Partition 1 does not start on physical sector boundary.
/dev/sda2      1935093760  1953521663     9213952    7  HPFS/NTFS/exFAT
/dev/sda3      1912696830  1929230335     8266753    5  Extended
Partition 3 does not start on physical sector boundary.
/dev/sda4      1729976320  1912694783    91359232   83  Linux
/dev/sda5      1912696832  1929230335     8266752   82  Linux swap / Solaris

Partition table entries are not in disk order

Disk /dev/sdb: 7862 MB, 7862353920 bytes
37 heads, 37 sectors/track, 11217 cylinders, total 15356160 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    15356159     7674048    c  W95 FAT32 (LBA)

Disk /dev/sdc: 8053 MB, 8053063680 bytes
255 heads, 63 sectors/track, 979 cylinders, total 15728640 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: 0x00000000

   Device Boot      Start         End      Blocks   Id  System
/dev/sdc1   *        2048    15728639     7863296    b  W95 FAT32
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Imro - you appear to have multiple accounts. Please register one of these accounts and then click the contact-us link at the bottom of this page to request your other accounts are merged. Once done you'll be able to edit your question again with further info. Thanks. –  fossfreedom Oct 10 '13 at 11:28
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1 Answer

Reinstall GRUB2. Hopefully your OSes are still there and something happend to GRUB... See: https://help.ubuntu.com/community/Grub2/Installing

With the extra info you provided the commands should be

sudo mount /dev/sda4 /mnt

sudo grub-install --boot-directory=/mnt/boot /dev/sda

The first one mounts your ubuntu file system and the second one repairs the GRUB installation.

Then reboot.

share|improve this answer
    
That's a bit complicated for me, I'd rather someone to tell me exactly what to do step by step if possible :/ –  Imro Oct 9 '13 at 20:33
    
Okay, can you do a sudo fdisk -l and post the output in your original post? –  Dunkit Oct 9 '13 at 20:40
    
Alright, done :] –  Imro Oct 9 '13 at 20:45
    
See my edit of the original answer... –  Dunkit Oct 9 '13 at 21:01
    
Can you access sda1 and/or sda2 (which I assume are the windows partitions) from your Ubuntu installation at all? –  Dunkit Oct 9 '13 at 21:32
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