“How do I get my desktop icons back on Windows? My nephew was playing around with my laptop, and now my desktop is blank except for the start button on the lower right. I’m sure I’ll smack my forehead ...

You can change nearly any desktop icon on both Mac and PC. To change desktop icons on a Mac, open the "Get Info" menu and paste in the picture you want to use. On a PC you'll need to make a .ICO file, ...