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
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.