Your computer desktop wallpaper may need spiffing up. Perhaps you'd like your wallpaper more customised. Adding a wallpaper border is quick and can add that little something to that desktop background you have to stare at all day. You can edit you current wallpaper using image-editing software to include a border.
If you don't have image-editing software, download and install it. GIMP and Pixlr are examples of free image-editing tools that make adding a border to an image quick and easy. Photoshop is also an image-editing software that is used in most production settings.
Create a new blank white page with dimensions larger than your current wallpaper image using your image-editing program. For example, if your wallpaper is 1024 by 800 pixels, create a new image that is 1224 by 900 pixels if you want your border to be 200 pixels wide and 100 pixels high.
Create a new layer above your white background, to hold your current wallpaper image.
Import your wallpaper image into the layer you created. Center the image against the white background.
Select your background layer, which has now become your border. Customise the layer with one of several tools: Use the Paint Brush tool, if you'd like to add some colour; the Text tool, if you'd like your border to have some text; the Shapes tool, if you're not so good at freehand drawing. You can also use filters from your image editor's "Filter" menu to apply a design or pattern to the border.
Go to "File," click "Save as...," and save your picture as a "JPEG" image with a new file name. To adjust your desktop wallpaper to your new image, right-click on some blank space on your desktop, and click "Properties." Under the "Desktop" tab, click "Browse," and navigate to where you saved your bordered picture file. Click "Open" and then "OK" in the Display Options window to set your background to your new picture.