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I have Windows 7 as base operating system, and I have installed Ubuntu 13.10 on it.

A few days later, my Windows 7 became corrupted. I installed Windows 7 again, but when I start the computer, there is still an option for Ubuntu in the boot manager. When I select the option for Ubuntu in the boot manager, it is not working(obviously due to data loss), because I installed Ubuntu in a partition in which window 7 is present. If I format the C(drive) as usual all data will be lost & I will lose ubuntu also but the problem is that option how can i trouble shoot that problem,so please tell me how to remove the option for it to install another copy of Ubuntu.

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// , Would you be willing to separate some of the run-on sentences, here? I don't mean to be rude. However, sometimes a little effort to formatting a question helps us. It goes a long way toward getting the right answer, right away: – Nathan Basanese Jun 11 '15 at 20:20
  1. I would recommend that you backup your important data in C:\ to another partition. (If you have 3 partitions, it would be the third partition. If only 2, the second partition).

  2. Then reinstall Windows 7 on C:\.

  3. Move back the important data to the initial location (in your case, it would be C:\), then format the duplicate Window 7 partition.

  4. Reinstall Ubuntu to initial location. Ubuntu will install boot manager (grub).

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