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

When I go to install Ubuntu so I can dual boot Ubuntu with windows 8.1 on my Toshiba Satellite C55 the Ubuntu installer does not sense My pre-installed windows 8.

I referred to these guides: UEFI and installing Ubuntu on pre-installed-windows8 64bit system, but the first link suggests, to use the install Ubuntu along sideoption or make an EFI partition however it also says to only have one EFI partition on the hard drive and windows is in an EFI Partition.

  • So I need to know how to Get Ubuntu to sense windows 8.1 or how to manually partition the hard drive so I can dual boot. Just so you know I have a Kubuntu 13.10 on a disk, Ubuntu 13.10 on a disk, and Ubuntu 12.04 on a disk.

If you need any more tech specifications I can give them to you.

share|improve this question

marked as duplicate by Eliah Kagan, Eric Carvalho, terdon, Avinash Raj, BuZZ-dEE Mar 19 '14 at 18:44

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

Related: How do I install Ubuntu beside Windows 7 using “Something Else”? (If they end up being considered duplicates--which I think is likely the best thing to do--then we should generalize the title of the master question and ask moderators to merge answers, since the answer here appears quite valuable.) – Eliah Kagan Mar 16 '14 at 0:09
@EliahKagan I think Installing Ubuntu on a Pre-Installed Windows 8 (64-bit) System (UEFI Supported) might be a better duplicate since windows8 OEM == UEFI while windows7 does not. This sounds like a UEFI specific issue. – terdon Mar 19 '14 at 0:44

First, try disabling Fast Startup in Windows. This feature is incompatible with dual-boot configurations, and it's conceivable that it's causing the problem you're seeing, although I'm far from positive of that. If this works, I'd appreciate seeing a comment to that effect so that I know it's a possible solution.

Second, if that doesn't work, you'll just have to use the "Something Else" installation option. (That referenced question/answer refers to Windows 7 and may have some Windows 7-specific elements, but the basic principles still apply.) Unfortunately, a lot of people have been seeing this problem with Windows 8 and 8.1 installations, and doing the partitioning manually is what works for most people.

share|improve this answer

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