Show desktop icons is unselected. To Fix this just turn that option back on. To turn the option back on,Follow the steps:
1.Right click the desktop.
2.Select View and then Show desktop icons.
Make sure the option is checked
Are there too many icons on your desktop?
If your desktop becomes crowded with too many icons, some icons may overlap or seem to disappear.
Turn the Auto Arrange option on and then off again by right-clicking an empty area of the desktop, click View, and then click Auto Arrange. To turn off the Auto Arrange option, click Auto Arrange again, clearing the check mark next to it. You may need to move your icons to the place on the desktop where you want them.