I have a 1TB hard drive containing Windows 7 Home Premium and another 0.7TB hard drive containing Ubuntu Studio. After I installed Ubuntu, I got the new GRUB boot screen, and I wanted to remove it and get the Windows 7 boot screen. Silly as I am, I managed to mess up the boot part, so when I try to boot into Ubuntu I get a message that says: No operating system found and when I try to boot Windows I just simply get a black screen with a blinking underscore character. I have a Windows 7 System Repair Disc, but when I tried various commands they resulted in these error messages. Does anyone know what is wrong?


The Windows bootloader cannot boot Ubuntu and Windows. Grub however can, so stick with Grub. Try fixing Grub with the Super Grub Disk found here

  • yeah i used the supergrub disk but it didnt work, im trying to boot into zorin to try a grub repair tool – anders287 Dec 18 '13 at 20:57
  • You could always boot the Ubuntu Install disc and manually reinstall grub from the command line too. – Alex Dec 18 '13 at 21:05

Windows 7 boot can be fixed using Windows 7 Recovery CD/DVD:

  1. bootsect /nt60 all /force /mbr

  2. bcdboot c:\windows - where c: is Windows drive, if not change drive letter.

To chain load Ubuntu from Windows boot manager you could use the method described in Dual boot Windows 7 and Linux/UNIX.

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