Where is my Win 8.1? Installing dual boot of Win 8.1 and Ubuntu 14.04.1 LTS on ASUS Vivobook S400CA

I am not the most experienced in installing Ubuntu, and I have heard that installing Ubuntu on ASUS Vivobook is problematic. Is anyone here has experience in doing this?

I tried to follow the instructions here - ubuntu-on-touch-screen-laptop-setting.

But at the installation type screen I don't have the option to install Ubuntu alongside Windows 8.1, I only have the following options:

• Erase disk and install Ubuntu


• Encrypt the new Ubuntu installation for security


• Use LVM with new Ubuntu installation


• Something else

What should I do?

Edit I'm re-writing this answer to match the edited question Edit

This issue is caused by UEFI Boot. The Unified Extensible Firmware Interface (UEFI) (pronounced as an initialism U-E-F-I or like "unify" without the n)[a] is a specification that defines a software interface between an operating system and platform firmware. UEFI is meant to replace the Basic Input/Output System (BIOS) firmware interface, originally present in all IBM PC-compatible personal computers. In practice, most UEFI firmware images provide legacy support for BIOS services. UEFI can support remote diagnostics and repair of computers, even without another operating system

Education out of the way, the steps to work around this issue are long, but not overly painful. Due to their length, I am going to very briefly summarize them here:

1) Backup Windows

2) Create your Installation Media

3) Shrink your windows partition

4) Turn off Secure Boot

5) Install Ubuntu

The guide has a lot of instructions here that I didn't need the last time Installed. So before I give you the link to follow, here's my caveat: If the installer gives you the option of installing alongside Windows, use that instead of this guide. If you still don't see it, then follow the guide.

All that said, here is the link: http://www.everydaylinuxuser.com/2014/05/install-ubuntu-1404-alongside-windows.html

I also recommend logging into the Ubuntu IRC channel during the install. If you have any questions, you can connect right with the community rather than having to wait for replies here. Should they walk you through different steps, please let us know what worked for you so that we can clean up this question.

~ Geary