Open a command prompt (admin). Just click on the start icon, start typing the word command. Command Prompt should appear at the top of the list, right click on it, run as administrator. Let's say your Windows 7 partition shows up as F: drive in file explorer and your Windows XP shows up at G: drive. You would run the following commands:. 2017. 7. 10. · The Basics. The process for creating a dual-boot system is similar no matter what operating system you’re dual-booting with. Here’s what you’ll need to do: Install the First Version of Windows: If you already have a single Windows system installed on your computer, that’s fine.If not, install Windows normally. You may want to use custom partitioning settings and.