I wanted to install Ubuntu 12.04 side by side with Windows 8.1 in my SSD. Windows is already installed in MBR, even though I have a UEFI machine. And so I used the legacy Bios. I have confirmed that Windows is installed as MBR. Also, if the bootable usb drive seen in the boot menu shows [uefi] then it automatically installs it in GPT. I was able to create a bootable usb disk using Rufus 1.4.9 that installs Windows in legacy mode (i.e. there is no [uefi] prefix in the boot menu)
Unfortunately, doing the same method for Ubuntu. It created a uefi based bootable usb. I tried universal usb installer but it is still the same. Booting it, it detects the windows partition and windows recovery partition as free space!
But Windows boots perfectly. Is Ubuntu 12.04 x64 can not be installed in an mbr disk?