Click on the link. When the picture opens, right click on it, and select 'Set as background image'.
If the picture opens in the Paint programme, choose 'Set as Wallpaper' from the 'File' menu.
If you cannot see the whole picture, go to your 'Start' menu. Select 'Settings', then 'Control Panel', then 'Display', then 'Background'. Choose 'Stretch' from the 'Position' box. If the stretch option is not available, try changing your screen resolution to at least 1024x768. To do this, drag the arrow in the 'Settings' section.
Screensaver (PC)
Click on the link. Choose 'Save' and save to your PC.
When it is saved, choose 'Open', then 'Install'.
You can then open your 'Control Panel' and click 'OK' to select it as your current screensaver.
Screensaver (Mac)
Click on the link. Save the file to your computer.
Double click on the screensaver icon and follow the instructions given. You may need to restart your machine before the new screensaver will work.