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I installed ubuntu 12.04 LTS alongside Microsoft 7. Ubuntu worked fine but windows 7 won't start. I get the GRUB menu choice Windows 7 (loader) (on /dev/sd2), and the other two windows menus, I can go as far as windows's splash screen (repair didn't work) and then the computer will restart again. Here is output of running sudo fdisk -l:

Disk /dev/sda: 640.1 GB, 640135028736 bytes
255 heads, 63 sectors/track, 77825 cylinders, total 1250263728 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: 0xbe2f2b88

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1      1127026686  1214746623    43859969    5  Extended
Partition 1 does not start on physical sector boundary.
/dev/sda2   *        2048      409599      203776    7  HPFS/NTFS/exFAT
/dev/sda3          409600  1127025394   563307897+   7  HPFS/NTFS/exFAT
/dev/sda4      1214746624  1250050047    17651712    7  HPFS/NTFS/exFAT
/dev/sda5      1181300736  1214746623    16722944   82  Linux swap / Solaris
/dev/sda6      1127026688  1181300735    27137024   83  Linux

Partition table entries are not in disk order

Thanks in advance.

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