Although Windows 10 includes many ways to personalize your experience, the quickest way to change the look and feel is to use a theme.
To get and apply a new theme on Windows 10, do the following:
Step 1: Open Settings.
Step 2: Click on Personalization.
Step 3: Click on Themes.
Step 4: Click the Get more themes in the Store link.
Step 5: In the Microsoft Store, pick the theme you want, and click the Get button.
Step 6: Click the Launch button to go back to the Themes settings.
Step 7: Click the newly added theme to apply it.