Ask Ubuntu is a question and answer site for Ubuntu users and developers. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I just installed Ubuntu alongside window 7 by following the instructions on the internet . I can use Ubuntu successfully. But I failed to boot Window 7.

I got this error: invalid EFI file path.

I was looking at other similar posts. They mentioned something like ""Window UEFI", which I have no idea what is means.

Please can someone tell me how to boot Window 7 again without losing everything on Win 7.

UPDATE: I reboot my laptop again. I pressed F2 / F10 to launch boot manager. I changed the boot option: boot option #1: Window blablabla boot option #2: Ubuntu blablabla boot option #3: Ubuntu blablabla

Then Suddenly I was able to launch Win 7 again. The weird thing was that it ran a disk scan / file scan after I logged onto my Win7 account. And I was prompted to format the local disk (:E) , which was where i installed my Ubuntu.

I am very puzzled now. Why cant I launch Win 7 in GRUB, but I can do so after rearranging the Win 7 boot option. Should I really consider removing Ubuntu, since I am worried I am going to lose my Win 7 again ?

share|improve this question

Is this a newer computer with UEFI (and BIOS)?

Many then have Windows in BIOS mode, but when booting Ubuntu the UEFI/BIOS may boot in either UEFI or BIOS mode and install in that mode.

Or a few Windows 7 systems were installed in UEFI mode and you installed Ubuntu in BIOS mode.

Either way, to dual boot from grub menu both systems have to be either UEFI or both BIOS.

Best to see details and Boot-Repair can convert a BIOS install of Ubuntu to UEFI or vice-versa. You cannot easily convert Windows from its current install.

Post the link to the BootInfo report that this creates. Is part of Boot-Repair:

Boot Repair -Also handles LVM, GPT, separate /boot and UEFI dual boot.:

You can repair many boot issues with this or 'Create BootInfo' report (Other Options) & post the link it creates, so we can see your exact configuration and diagnose advanced problems.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.