Windows 7 and XP each have their characteristics, advantages and disadvantages, of course Windows 7 represents the maximum point in the evolution of these operating systems, but still is not perfect and has several limitations. The ideal solution is to have installed Windows 7 on one partition and Windows XP on the other, with a boot menu that allows us to choose which operating system to start, this method allows you to leverage the advantages and qualities of both operating systems, for example: continue and not give up only functional previous programs with Windows XP. Continue and not give up older hardware devices that Windows 7 does not recognize and for which there are no drivers available as: printers, video cards, modems, etc. Take advantage of the new features of Windows 7 which have been perfected and others that have been added and did not exist previously. To connect to our PC successfully last technology such as hardware devices: mobile phones, camera, smartphone, etc. for which Windows 7 already brings including the necessary drivers. As do this type of installation? There are several methods, on the next page you can read a tutorial explaining step by step procedure, all available options and choose the most appropriate for your specific situation, can even do it without having to modify the Windows that you use currently. Installing and using Windows 7 and XP simultaneously.
You can also read methods that allow the use of different multiple operating systems simultaneously, whether it be Windows, Mac or Linux platform. Enable start menu of two operating systems. Finally I recommend the following page dedicated to additional options for the installation source, either from a disk, flash memory, a local folder, etc.