two screens in print screen

[drbass]

I whacked this enquiry originally in Hardware but got no response. The computer in question is a Toshiba Satellite 1410. I was print screening a desktop image and when I placed the image in MS Paint, I noted I had two screens. When the XP Pro screen saver starts, the XP symbol disappears, presumably into this ‘second’ screen and then reappears. I am using 1024 x 768 resolution, the display list states: Toshiba internal 1024 x 768 Panel on NVIDA Gforce 420. I have no idea what is happening, I can obviously only see the left screen but I note that I can loose the cursor into this ‘second’ screen. Any ideas?

DB