Instructions on how to post a picture of your Desktop:
1.Minimize or close off every apllication on your PC.
2.Press the print screen button on your keyboard, and open up microsoft paint(mspaint).
3.Right click, the any part of the plain white area and select paste(or just press control +v)
4.The picture of your desktop should appear, save it at any desired location.
5. go to any image hosting site and upload your picture there....Next, the rest is all up to you