6 months ago I formatted my 320GB hard disk drive and changed the partition table to GPT, then I installed windows 8.1. With gparted I formated my whole hard disk and changed the partition table to MSDOS. Then I installed windows 7 ultimate.
After that I started to install ubuntu 14.04 but there was no option to install along side my windows 7. I didn't pay attention and I selected something else. I made 30 GB partition for Ubuntu and 3 GB for swap with gparted. All the things went well but when I started the lap top again it was only Uuntu booting and there wasn't any option to choose windows booting. It seemed that windows is not installed.
Then I again formated my HDD and installed windows 7. Now I want to install ubuntu but still facing the same problem. There is no option to install along side windows 7. Ubuntu doesn't recogniz my os. I tried
sudo os-prober but it answers nothing.
What should I do ? I do really love ubuntu? Sorry for my bad english. With special thanks.