You're Welcome!

One look at the wallpaper you have there looked too close to an original since that seems to have been changed by removing the Windows 7 stamp and logo at the bottom right with someone adding the text on the upper left there.
The glowing "7" however is identical in every way. As for resizing the paper you can use paintNET to see it changed from the 1680x1050 res without too much distortion for something like 1440x900.