I have installed Ubuntu 14.04 on my notebook. I chose alongside with Windows 7 mode. The installation was successful. After restarting and rejecting the Ubuntu disk computer started to load Windows without asking me make a choice between Ubuntu and Windows? What's a problem guys? Moreover I checked Ubuntu disk again it showed me that Ubuntu has already been installed and ready to use.
2 Answers
You need to install GRUB (GRand Unified Boot-loader).
The installer should have asked if you want to install GRUB and you should have said YES. I think you can choose OS at boot time by pressing F8 or F12.
You should install a boot-loader either from Ubuntu (if you manage to start it) or directly from Windows.
I would recommend installing EasyBCD and add an entry for Ubuntu in bootloader.
Search Google for how to use EasyBCD to know more.