I have a problem.  I installed Mojango to dual-boot on my PC, but because my motherboard doesn't have an onboard graphics card the boot loader freezes when I try to choose the OS.  Do you know how I can fix this?
Yes! You should be able to install Grub2 which is the default bootloader for Ubuntu and other Debian based systems. It should detect your Windows partition and allow you to select the operating system to boot into. If that's not the case there are other solutions such as creating a USB drive with a bootable copy of Linux or using a virtual machine to run Linux alongside windows. Let me know if you need any further assistance.