Q:

Dual boot ubuntu over windows gone wrong

I tried dual boot ubuntu 14.04 with windows 7 (w7 already installed). I  watched videos and read tutorials which i followed step by step. However, after installing ubuntu and rebooting my pc i noticed that there was not any option whether to choose w7 or ubuntu and run automatically ubuntu. Did i erased windows 7 or i have a chance to load windows again?If i have, can u give me a piece of advice ?
if u need more information about my messy installation please let me know.
Thank you in advance!

A:

It doesn't necesarily mean you've deleted your Windows installation. In fact, this is a very frequent problem when trying to make a dual boot.
Try using Boot-Repair, a tool which fixes this kind of problem.
You just have to boot in Ubuntu and type the following in a terminal to install it:
sudo add-apt-repository ppa:yannubuntu/boot-repair
sudo apt-get update
sudo apt-get install -y boot-repair && boot-repair

Once the program is open, just click "Recommended repair" and cross your fingers!
If you need any further information, you can take a look here.

