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I First Installed Windows 8 And Then I Installed Ubuntu 12.10. Now I`m Unable To Boot Windows 8. How To Fix This Grub?

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can you give more details. whether GRUB menu has windows and when selected it doesn't boot or GRUB menu itself doesn't have an entry about windows 8. –  sai siva sundar Nov 16 '12 at 9:07
    
Geting Ubuntu Grub Menu And When Selecting The Windows8 /sda1/ press ctrl+alt+del It`s Shwoing Like That –  Vishnu Praneeth Reddy Nov 16 '12 at 11:14

2 Answers 2

up vote 1 down vote accepted

I am going to make some assumptions:

  1. That Windows is installed and configured to boot via UEFI.
  2. Ubuntu is installed and configured to boot via UEFI.
  3. You're currently seeing the grub menu at boot.

If any of those assumptions is false, then the following advice will not help you (though it won't hurt anything either):

Create a file, /boot/grub/custom.cfg (by running sudo gedit /boot/grub/custom.cfg) with these contents:

#This entry should work for any version of Windows installed for UEFI booting

menuentry "Windows (UEFI)" {
 search --set=root --file /EFI/Microsoft/Boot/bootmgfw.efi
 chainloader /EFI/Microsoft/Boot/bootmgfw.efi
}

(Copy and paste the above into the Gedit window that comes up, then save and quit Gedit)

Then reboot and you should see an entry titled "Windows (UEFI)" and if you select it then Windows should boot. If that does not work, please run boot info script ( http://bootinfoscript.sourceforge.net/ ) and post the RESULTS.txt that it produces so that I have the information needed to give you proper advice.

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thanks for the reply and i fixed this with easily by installing Grub Tool –  Vishnu Praneeth Reddy Nov 16 '12 at 11:15

Fix This Problem Just By Installing Boot-Repiar

It Will Take Care Of Rest Of The Things

It will fix Automatically jUst by Running This Tool

What You Have To Do Is Just Install And Run :)

Things To Do

First open a new Terminal, then type:

sudo add-apt-repository ppa:yannubuntu/boot-repair && sudo apt-get update
  • Press Enter

  • Then type:

    sudo apt-get install -y boot-repair && boot-repair
    
  • Press Enter

Boot-Repair

Screenshot OF Boot-Repair

Go To This Link Here You i`ll Find This Tool And How To Install -Reference

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