I've tried installing Ubuntu 14.04 LTS alongside my Windows 7 OS, following the exact procedure given by the Ubuntu website and random other tutorials. I've tried with a LiveCD and with a USB stick but I always run into the same problem.

When I'm at the screen where I'm allowed to select how I want to install Ubuntu ("alongside", "erase Windows 7", "something else"), the first option says "Install Ubuntu inside Windows 7" instead of "Install Ubuntu alongside Windows 7". From pretty much all tutorials I've seen, the tutorial says that the option should say "alongside". I click "inside" anyway, and Ubuntu doesn't install at all. Instead, my computer just reboots, and goes back to the Try Ubuntu or Install Now screen. This happens regardless of using a LiveCD or a USB stick.

I've also tried manually resizing my partitions using "something else". Oddly, I see 4 sda partitions:

/dev/sda       type      size       used
  /dev/sda1              1mb        unknown     Windows 7 (loader)
  /dev/sda2    ntsf      208mb      unknown     Recovery Windows Environment (loader)
  /dev/sda3    ntsf      ~752000mb  unknown     Recovery Windows Environment (loader)
  /dev/sda4              ~18000mb   unknown

I try resizing the largest partition, but some sort of internal error occurs and it doesn't let me resize my partitions.

Any ideas on what's going on and how to solve it?