How to install Ubuntu 14.04 on Lenovo Y500 with Windows 7 (UEFI)?

Question

linux

There is a Lenovo Y500 laptop with Windows 7 installed and two possibly related problems:
1. UEFI is turned off, i.e. Boot Mode = Legacy Support ( screen , more screen ).
If I turn on UEFI ( screenshot , another screen ), then Windows does not boot: a black screen with the message "Checking media [Pass] >>Start PXE over IPv4, press [ESC] to EXIT..." ( screenshot , another screen ).
2. You need to install Ubuntu. Now in Windows, the only 1TB disk is divided into 3 partitions, one of which will be occupied by Ubuntu (the other two are Windows and a file cleaner). When installing, the OS does not see partitions with Windows, and Gparted gives an error:

Answer 1

In zero, you have a partition table - GPT!
First, don't use fdisk, it doesn't understand GPT correctly!
Secondly, if translated from English, it sounds something like this
You need to answer YES! And Everything! The installer will then treat the table as if it were a GPT table.
Unless, of course, you killed GPT with something like fdisk....

Answer 2

Why did you do it? I recently installed Ubuntu on a slightly different laptop. Lenovo z500 /
Make settings in the BIOS default settings, then put ubuntu, then Windows. and all

Answer 3

How did you get the current partition table? Have you converted from GPT to MBR? If yes, write with what program, maybe it worked incorrectly.