i am new at linux and ubuntu, today i installed ubuntu 12.04 but during installation some problem happened, i don't remember what was that exactly (but can tell you that it was related to boot), so i reinstalled ubuntu (using usb stick both time) and ubuntu installation finished successfully,
Now problem is that when I start my computer then system is directly selecting ubuntu as my operating system, i have installed it along with windows 7 in option during installation, so it should give me option to select which operating system i want to use. I don't know what may be the problem.
Also, I want to know where ubuntu is installed (which directory)? i just selected default setting during installation as i am noob in these things.
/** i think i found problem, problem is that during startup the selection of operating system is hidden behind this square box saying that 'out of range 92.5khz / 58hz' , i was able to guess windows 7 option will be last so using my sense i can choose operating system now. but now again new problem that message (i think there is some screen resolution problem so desktop is unable to display window saying that out of range),
i have no idea how to solve this problem now.) */
GRUB. I download GRUB Customizer and change the resolution of the screen and now I can see all the menu!