The quickest way to change your background
On Windows, right-click any empty space on your desktop, select Personalize, then choose Background from the left menu. Pick a built-in image, upload your own photo, or select a solid color. On Mac, open System Settings, go to Wallpaper, and click the image you want. Both systems let you set different backgrounds for each monitor if you have more than one.
The whole process takes under a minute. You do not need to restart your computer or install anything—the change happens when ready.
Key Takeaways
- Windows users right-click the desktop and select Personalize, then Background, to change the image in seconds.
- Mac users open System Settings, navigate to Wallpaper, and click the image they want to use.
- You can use photos from your computer, built-in images that come with your operating system, or solid colors.
- If you have multiple monitors, you can set a different background on each one.
- Some background images may affect how quickly your computer starts up or how much memory it uses, though the difference is usually tiny.
Changing your background on Windows 10 and Windows 11
Right-click any blank area of your desktop—not on a file or folder, but on the empty gray or black space. A menu will pop up. Click Personalize near the bottom. A settings window opens on the right side of your screen.
In the left sidebar, click Background. You will see three options: Picture, Solid color, or Slideshow. If you choose Picture, Windows shows you built-in images organized by category. Scroll through and click the one you want. If you want to use your own photo, click Browse at the bottom, navigate to the folder where your photo is saved, and select it. The change takes effect when ready.
If you pick Slideshow, your background will rotate through multiple images at an interval you set—useful if you like variety. If you pick Solid color, you get a plain background in any color you choose from the palette.
Changing your background on Mac
Click the Apple menu in the top-left corner and select System Settings (or System Preferences on older Macs). In the sidebar, look for Wallpaper and click it. You will see thumbnails of available images organized by category: Dynamic, Light, Dark, and Collections.
Click any image to preview it on your desktop. If you like it, it becomes your background automatically. To use your own photo, click Add (or the plus icon) at the bottom, navigate to your photo, and select it. Mac will ask whether you want the image to fill the screen, fit within it, or stretch to cover it—choose whichever looks best to you.
You can also set different backgrounds for your login screen and your desktop. Look for the Login Window option in the Wallpaper settings to change what appears when you start your computer.
Using your own photos as a background
Both Windows and Mac let you upload any photo from your computer. The image works best if it is at least as wide and tall as your screen's resolution—most modern photos from phones or cameras are large enough. If your photo is smaller, the system will stretch it, which may make it look blurry.
On Windows, click Browse in the Background settings and select your photo file. On Mac, click Add in the Wallpaper settings. Both systems accept common photo formats: JPG, PNG, and BMP. You can use a screenshot, a family photo, artwork, or anything else saved on your computer.
If you want to use a photo from the internet, read it to your computer first, then follow the steps above. Do not try to drag an image directly from a web browser to your desktop—it usually does not work.
Setting different backgrounds for multiple monitors
If you have two or more monitors connected to your computer, you can set a different background on each one. On Windows, right-click the desktop and go to Personalize > Background. Select your first image, then right-click it and choose Set for monitor 1 (or whichever monitor number you want). Repeat for each monitor with a different image.
On Mac, the process is simpler: open System Settings > Wallpaper, then click on each monitor's thumbnail at the top and select a different image for it. Your Mac recognizes each monitor separately and remembers which background goes where.
Troubleshooting background changes that do not stick
If you change your background but it reverts to the old one after you restart, your computer may have a setting that overrides your choice. On Windows, check whether Windows Spotlight is turned on in the Background settings—this feature automatically changes your background to promotional images. Turn it off if you want your chosen image to stay put.
On Mac, make sure you have permission to change settings. If you are using a work computer or a shared account with restrictions, your administrator may have locked the background. Try logging in with a different account to see if the problem is account-specific.
If your photo file is corrupted or in an unsupported format, the system may refuse to use it. Try a different image to rule this out. If the background still will not change, restart your computer—this fixes most temporary glitches.
How background images affect your computer's performance
A static background image uses almost no extra memory or processing power. Even a large, high-resolution photo has minimal impact on how fast your computer runs or how long your battery lasts. You can safely use any image without worrying about slowdown.
Slideshow backgrounds use slightly more resources because your computer has to load and switch between multiple images. If you have an older computer or a laptop on battery power, a static image is the more efficient choice. The difference is usually small enough that you will not notice it, but it is worth knowing.
Some animated or video backgrounds (available through third-party software) can use more power. If you stick with the built-in options in Windows or Mac, performance is not a concern.
Frequently Asked Questions
Can I use a video as my background instead of a still image?
Windows and Mac do not support video backgrounds through their standard settings. However, third-party software like Wallpaper Engine (Windows) or similar tools can add this feature. These programs cost money and use more of your computer's resources, so they are optional.
What happens if I delete the original photo I used as my background?
Your background will disappear or revert to a default image. Your computer stores a copy of the background in its system files, but if the original file is deleted, it may not refresh properly. Keep your background photos in a folder you do not plan to delete.
Can I schedule my background to change at a specific time each day?
Windows Slideshow can rotate images at intervals you set, but it does not follow a daily schedule. Mac has no built-in scheduling feature either. Third-party tools can add this, but the standard operating systems do not include it.
Why does my background look blurry or stretched?
This usually happens when your image is smaller than your screen resolution. Use a larger photo, or check the fit settings (on Mac, you can choose Fill, Fit, or Stretch). If the image is very small, it will always look blurry when enlarged.
Do I need to be an administrator to change my background?
No. Changing your background is a basic user setting that any account can do. If you cannot change it, your computer may have restrictions set by an administrator or employer, or you may be using a guest account with limited permissions.