I have Windows 8.1 32-bit on my PC and I want to install Kali Linux 1.0.8 64-bit or Ubuntu 14.04 64-bit on my PC (my PC can run a 64-bit OS). I need GRUB2 to install the OS to my bootloader but I can't find the page to download and install it. Is it just for Linux or can I install it on my Windows system? I have a program called WinGrub but I don't know how to use it. How can I Get GRUB2 on my system?