Black Desktop

[Messalina]

My pc's desktop has turned black although all the icons are visible. I think it has something to do with the message about possibly having a dodgy copy of Windows. You know the one - it asks if you want to verify authenticity & then wants to charge you. Any ideas how I can get rid of the message & restore the desktop to normal gratefully received. Oh & my copy of Windows is genuine! TIA

[tamborine]

Go to Control Panel, Display, Desktop. On left is a window of background list. On right is Browse where you can choose to insert any filed picture from your PC.

If you make changes, press Apply and your desktop should show whatever you've chosen.