If you choose to set your lock screen background as a picture, you will have five images to choose from. These images won’t be a slide show, but will interchange every time Windows enters into the lock screen. The five most recent images that you set as your lock screen background image will be used interchangeably as your lock screen images. The default lock screen background images included in Windows are located in the C:\Windows\Web\Screen folder. You should however, note that this folder houses the default images only. If you have set personal images as your lock screen images, they will be copied and stored in the C:\ProgramData\Microsoft\Windows\SystemData{SID}\ReadOnly folder; where {SID} is the user account Security Identifier (SID). You can find your user account SID by typing the following command in Command Prompt: whoami /user. The SystemData folder has tight security (NTFS), and even Administrators can’t view the folder contents by default. However, by typing the full path (with your SID) of the target folder in Explorer, you can see the contents of the folder. This means deleting your images from your personal folders will not remove it as a lock screen background image. When you open the Lock Screen Settings page, it shows the thumbnail images of last five lock screen images used. If you see an image you don’t want to appear as your background here is how to change it.
Method 1: Add new lock screen background images from the lock screen settings
The lock screen holds 5 images and by replacing them all the cache from old photos is essentially cleaned. To remove a thumbnail image from the Lock Screen Background page:
Method 2: Set new lock screen background images from the image viewer
The default Windows 10 image viewer offers a fast and simple way to set a new lock screen background. If you don’t want to go to settings and browse for your images, you can use the following procedure to replace the unwanted image. However, to make sure your image is no longer in the list of lock screen images, you will have to set new background images 5 times. You can also use Ctrl + L in the Windows image viewing application to set an image as your lock screen background.
Method 3: Using Powershell
We can also make use of Powershell to get rid of saved pictures that we are unable to delete otherwise. In order to do that:
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