How to Install a Windows Operating System.This is operating system tutorial app which shows Step-by-step Guides to Installing Windows 11,10, 8, 7, Vista, XP and 98 and how windows upgrade. This app shows how to enter your computer's BIOS and set boot priority. How to Install a Windows xp Windows XP is one of Microsoft’s most popular operating systems, and many people still use it exclusively.windows XP is a personal computer operating system that was produced by Microsoft as part of the Win