Test this:
Open a terminal,
Press Ctrl+Alt+T
Run it:
sudo -i
apt-get update
apt-get install build-essential
wget http://downloads.sourceforge.net/project/ms-sys/ms-sys%20stable/2.4.0/ms-sys-2.4.0.tar.gz?r=http%3A%2F%2Fms-sys.sourceforge.net%2F&ts=1415738967&use_mirror=ufpr
tar -xzvf ms-sys*.tgz
cd ms-sys
make
make install
ms-sys -7 /dev/sda
Note: This program is used to create Microsoft compatible boot records.
Usage:
ms-sys [options] [device]
Options:
-1, --fat12 Write a FAT12 floppy boot record to device
-2, --fat32nt Write a FAT32 partition NT boot record to device
-3, --fat32 Write a FAT32 partition DOS boot record to device
-4, --fat32free Write a FAT32 partition FreeDOS boot record to device
-5, --fat16free Write a FAT16 partition FreeDOS boot record to device
-6, --fat16 Write a FAT16 partition DOS boot record to device
-n, --ntfs Write a NTFS partition Windows 7 boot record to device
-l, --wipelabel Reset partition disk label in boot record
-p, --partition Write partition info (hidden sectors, heads and drive id)
to boot record
-H, --heads Manually set number of heads if partition info is written
-7, --mbr7 Write a Windows 7 MBR to device
-i, --mbrvista Write a Windows Vista MBR to device
-m, --mbr Write a Windows 2000/XP/2003 MBR to device
-9, --mbr95b Write a Windows 95B/98/98SE/ME MBR to device
-d, --mbrdos Write a DOS/Windows NT MBR to device
-s, --mbrsyslinux Write a syslinux MBR to device
-t, --mbrgptsyslinux Write a syslinux GPT MBR to device
-z, --mbrzero Write an empty (zeroed) MBR to device
-f, --force Force writing of boot record
-h, --help Display this help and exit
-v, --version Show program version
-w, --write Write automatically selected boot record to device
Default Inspect current boot record
Warning: Writing the wrong kind of boot record to a device might
destroy partition information or file system!