How to Change Theme in Windows 10
In Windows, you can use themes to change the desktop background, color and sound settings of your computer all at once to predefined settings (themes). Use the below steps to update the theme of your Windows 10 computer.
Open Windows settings’ App from start menu go to start menu and type settings and then click on settings
And then click on personalization
Click on the theme and then click on theme settings to open theme selection screen in the control panel
Theme selection screen will display all of the available themes on your computer like windows default themes, high contrast themes, and themes that you have created click on any of theme in theme selection screen to change your computer theme.
You can also download more themes from the internet