Installing Ubuntu 13.04 alongside Windows 8 on HP ENVY 17t j000 Notebook

I am having trouble installing Ubuntu 13.04 on my laptop (HP ENVY 17t j000). I have tried burning the .iso file to a blank DVD and have also used Universal USB Installer for the USB stick installation option as described on the Ubuntu website. The problem I am having is that no matter what changes I make to my BIOS settings (boot order, secure boot, legacy boot, etc.), I can't seem to get my machine to recognize that I want to run the Ubuntu installation through the live DVD or the USB.

I first tried the DVD approach and couldn't get my machine to recognize that there was an installation of Ubuntu available. Therefore, I bought a USB stick and tried this installation approach (this is what is exemplified in many youtube video tutorials on this subject). I followed the instructions that included directions involving the Universal USB Installer mentioned above and I finally got the machine to recognize that booting from the USB stick was an option, but I get a message along the lines of "the image file was unable to be authenticated" and it just boots Windows.

I would really like to be able to dual boot Windows and Linux to enjoy Windows as I have thus far, but learn an operating system that is easier to deal with in the web-development realm at the same time. Would someone be able to help me get Ubuntu installed on my machine so that when I plan on working on my sites, I can boot up Ubuntu, but when I wanna use my computer for anything else, I can boot Windows?

Please understand that I anticipate comments that will suggest I just do away with Windows. Thanks for the advice ahead of time, but I'd rather not.

Update:

I was able to get my machine to recognize my bootable usb drive. I turned off secure boot, turned on legacy boot, then I reformatted my USB drive through Windows rather than through Universal USB Installer, then downloaded a new version of the ISO image file, and used Universal USB Installer to, again, reformat the USB drive and mount the ISO to the USB drive. Then I restarted my computer and, after figuring out that a black screen was actually just the Ubuntu installation screen on a really low brightness setting, installed Ubuntu. I ran EasyBCD and iReboot, and now I have successfully got the Windows boot manager asking me if I want to boot Windows 8 or Ubuntu 13.04.

However, when I select to boot Ubuntu 13.04, I get an error message saying that Windows didn't boot properly. I am very confused by this. If I select Windows, it boots Windows just fine. But somehow selecting Ubuntu makes it think I'm still trying to boot Windows and it errors out. Anybody have any clue what is going on here?

Resolution:

After having professionals try to install Ubuntu as an operating system so that I can dual boot with Windows 8, an issue was exposed with the hardware that had apparently been there in the first place. The motherboard was replaced, and after getting the pc back that I purchased a very long time ago, I have decided to try using VirtualBox Ubuntu VMs to do what I can. This is not my preference, but I have grown tired of trying to get this to work. Maybe some day I will be willing to just have Ubuntu. But right now, I want both and this is the only way I can get it to work.