I downloaded the ubuntu-13.10-desktop-amd64.iso and I don't have a USB and a DVD burner. How can I install it on my Windows 8 64bit PC? Is it possible to just run the iso file? I tried running the Wubi inside the ubuntu-13.10-desktop-amd64.iso and it's not booting to the Ubuntu installation screen. I am planning on doing dual boot and I badly need it to test some stuff. Your assistance is greatly appreciated. Best regards.
No, this is not possible. Buy a USB stick. There are plenty of online guides showing you exactly how to install it.
Don't use Wubi, it should have been retired years ago. It's unstable, slow, and extremely hard to find help for.
There is a 64 bit mini.iso and 32 bit mini.iso. It is 34 MB and so you could burn it to a CD, if you have access to a CD burner. It does not have a live feature. It might be a text only installer. It installs everything from the internet, so you need reliable network hardware. It's much harder to install this way, but it's another option.