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I have installed Ubuntu 12.04.2 alongside Windows 8 (pre-installed,default in laptop). After installing and restarting, only Windows 8 opens, I don't see Ubuntu.

Radu Rădeanu
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1 Answers1

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You can use the SUPERGRUB2 disk to let search for your bootable OS on you computer. http://www.supergrubdisk.org/ (Try first)

After succesfully starting your two operating system, you can install a new GRUB in your boot sector (fixing and replacing)

demuxer
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  • The OP almost certainly has an EFI installation of Windows, but Linux might be installed in BIOS mode. It appears that Super GRUB 2 Disk doesn't (yet) support EFI-mode booting. Thus, although Super GRUB 2 Disk might get Linux booted, this won't really solve the underlying problem, which is the mixed mode (BIOS and EFI) of the OS installations. – Rod Smith Apr 23 '13 at 16:09