When it was leaked that Microsoft Windows 7 would have a full Windows XP compatibility mode, many believe that Windows 7 should be accompanied by a fully functional operating system running inside a virtual machine. Vista can run XP in Virtual PC 2007. However, Virtual PC 2007 has been criticized for being inefficient and slow, as it was to move all of the hosts called OS hardware. And 'natural to think that the way Windows XP is just a marketing gimmick designed to convince consumers that Seven is not plagued by serious problems of compatibility that Vista has become famous.
Obviously, it is desirable to use existing programs with new Windows 7 applications. Legacy applications can run directly through the interface of XP. This is done by installing legacy applications into the operating system through the virtual machine. If you want to run older programs on Windows 7 GUI, you must exit and close the virtual machine. If not disconnected, you will receive a pop-up indicating that you have the option to run the virtualized application or opening the virtual machine. Virtualized programs take a little longer to load programs that are installed natively on Windows 7, still can’t see significant differences between the opening of a native application and open a virtual application.
In fact, it would be difficult to tell whether an application is a virtualized application. By default, the way XP needs 256 MB of RAM, but RAM and other resources that are required by XP mode are adjustable. Now you can use Ctrl + Alt + Delete application directly to the Windows XP Security Mode using the menus. Technically, this is a momentous change, albeit very convenient none the less. XP now has access to USB devices with the guest operating system, which greatly increase its versatility and utility.