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I have a Lenovo laptop with preinstalled windows 8 64bit- I attempted installation of Ubuntu 13.04 - however after installation I was faced with the GRUB loader. From the Grub loader if I try to start up the Windows Loader option it wouldn't load windows 8 and instead show me an EFI file missing error.

Alternatively if I restart the laptop and click F12 key I get to the Bootloader screen where I can choose to boot either:

Windows Boot Manager

This is the only way I can choose to enter into either windows or Ubuntu plus after installing Ubuntu I've noticed that I now have a new unrecognised file format partition on windows 8 - I'm assuming its the Ubuntu partition.

The question is that how can I set up a dual boot screen that actually works here so I can choose to boot either windows 8 or Ubuntu?

share|improve this question
How did you install Ubuntu? In UEFI mode? Try running Boot Repair. Note down the link it provides you in the end so that you can give it to us if boot repair doesn't fix your problems. – Alaa Ali Sep 22 '13 at 12:05
Not sure what mode it was though - I just rebooted the system and selected to boot from the CD at the BIOS screen. Then ran a normal install i.e install Ubuntu Alongside Windows – Ali Sep 23 '13 at 6:36
You assume correctly that the partition Windows doesn't recognize is likely the Ubuntu partition. It seems there a a couple of ways you can do that. You can try this: or this:… – Elder Geek Jun 17 '14 at 19:46

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