HDMI cables

[dannyboy]

I think this should work -

Right-click on an empty area on your Windows 10 desktop, and click on Personalize. The Personalization settings app will open. Click on Themes in the left panel. Under Related Settings, click on Desktop icon settings to open its configuration box

[TrevL]

Sorry David, I'm windows 7, themes not there.

[dannyboy]

@TrevL
Okay, try this -

Right-click on an empty space of your desktop, and move the mouse pointer to highlight the View item on the shortcut menu. This should open another menu with several desktop customization options: If the Auto-arrange icons option is checked, uncheck it and see if that makes a difference.

[TrevL]

The auto arrange button was not checked, but I noticed the  "Align icons in a grid" was , so I've unchecked that , put it to sleep, re-awakened it, and the icon are where they were supposed to be, so I think that's sorted it .
Thanks David.