This document describes how to run Windows XP, Windows 7, and Windows 8 simultaneously on one computer by installing them as virtual machines within Windows 7. It recommends installing Windows XP and Windows 8 as virtual machines using VMware Player to avoid the complexity of partitioning the hard drive. Instructions are provided on upgrading Windows 7 Home to Professional, downloading XP Mode from Microsoft, and purchasing and installing Windows 8 before creating virtual machines to install each operating system.