Simple Steps to Change Windows 10 Custom Themes
How To Find Windows 10 Custom Themes:
Make sure the Windows 10 themes you are going to use are compatible with your Windows version
It is better to avoid themes that are not compatible with the Windows version
How To Change Windows 10 Custom Themes:
Extract the theme zip file you downloaded, then copy the theme source folder and theme files and paste them into (C: \ Windows \ Resources \ Themes).
Right-click on the desktop and click personalize
Navigate to the theme page on the personalize settings page. It will have the theme you are going to use
Note: The theme will show you on this page only if done correctly
Step-4 Now choose the theme for you
That’s all. If your theme has changed, maybe it has not changed, it means that your windows are not patched so the theme is not working. So patch your windows in this way then the theme will work for you.