Will i have to replace my lcd flatscreen monitor to use the touch screen in windows 7 operating system? -

To put it simply as the person above points out No. the reason for this is that a touch screen relies on embedded wires or cells with in the screen to detect were you are touching but you can get and overlay that will stick o your screen.

If you want to use the touchscreen functionality in Windows 7 you will need to have a touchscreen monitor. A regular monitor will work, but you won t be able to use the touchscreen functions.

No, you will not if you don t mind not using touchscreen Windows XP and Windows Vista already support touch screens, you just have to install the proper software.

No it will work with existing hardware.