Windows backup is a built-in feature that allows you to create a copy of your entire system, including all files and settings, and store it on a separate drive or external hard drive. This backup can be used to recover data in case of a system crash or other disaster, or to transfer your data to another computer or device. Here are the steps to create a Windows backup:

1. Click on the "Start" menu and select "Settings."
2. In the left pane, click on "System & Security."
3. In the right pane, click on "Backup and Restore."
4. On the left pane, click on "Create a system image."
5. Select the type of backup you want to create (full system image, disk image) and then click on "Next."
6. Choose a location for the backup file and then click on "Next."
7. Click on "Finish" to create the backup.

You can also create a custom backup by following these steps:

1. Click on the "Start" menu and select "Control Panel."
2. In the control panel, click on "System and Security."
3. In the left pane, click on "Backup and Restore."
4. On the left pane, click on "Create a custom backup."
5. Follow the prompts to choose the type of backup you want to create and specify the location for the backup file.
6. Click on "Next" and then "Finish" to create the backup.