How to remove Dual booting option and partition of Ubuntu?

Question

First of all, I'd like to state my partitions:

Windows 7 with:

C:\ Windows 7 (pre-existing installation).

D:\ Data (Already exists and has files).

I download Ubuntu 14.10 from a bootable usb. Then I delete Ubuntu's partition using a DVD Windows installer. When I reboot my laptop, Ubuntu's option is still exist and the partition is Healthy Logical not unallocated. When I click on delete partition, it became as free space not unallocated. Also, I tried to merge this partition back to C: but there's no extend volume option out there. I'm totally confused, how can I get my laptop normal again? How can I delete Ubuntu's partition and Ubuntu's booting option? I already read this question: How to remove Ubuntu and put Windows back on?. I've done the first answer of that question but the partition and the dual booting option persist.

Answer 1

First of all shrink that Logical Partition and then delete it, it will be transform as unallocated. In this situation you can extend the volume of C: or D:. Concerning the Ubuntu boot option task, I have deleted the sector Ubuntu/winboot/wubildr from cmd by this command bcdedit /delete {code identifier of the **Real-mode boot sector**}. To this moment everything is fine, ubuntu boot option is successfully deleted.