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No boot selection screen

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http://askubuntu.com – I recently installed Ubuntu 12.04 LTS alongside Windows 7 using Ubuntu's Startup disk creator and installation completed without any difficulties or errors. Now when I try to boot, it directly boots with Windows and shows no option to choice as to which Operating System to load. But when I boot using that same pen drive with which I installed Ubuntu, it shows an OS selection screen. I also tried the command sudo gedit /etc/default/grub & sudo update-grub and I see "Found windows 7(loader) on /dev/sda2" and "Found windows 7(loader) on /dev/sda3" messages while running the later command, (HowTos)

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Submitted by missing on 09/01/2012

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i just installed ubuntu 12.10 alongside windows 7 but now my computer automatically boots to ubuntu. i want windows 7 as my default operating system. when i start up my laptop it shows me no settings or any screen asking me what operating system to use.

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In Live CD i went in the terminal and when i do 'sudo update-grub' it responds

/usr/sbin/grub-probe: error: cannot find a device for / (is /dev mounted?).

Here's the breakdown of my drive:

sda1 - vfat - Windows 7: FAT32

sda2 -

sda3 - nfs - Windows Vista/7: NTFS - Windows 7

sda3/Wubi: -

sda4 - Grub2

sda5 - Ubuntu 12.04.1 LTS

sda6 -

sda7 -

sda8 - BIOS Boot Partition

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Possible Duplicate: How do I set Windows to boot as the default in the boot loader?

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