Windows 7 design can't be changed - that's why
It can happen that the Windows 7 design can no longer be changed. We'll show you how to fix the problem here.
So the design can be changed again under Windows 7
Since you need extended rights for the next steps, first make sure that you are logged in as "Administrator".
- Click "Start" and type "Run". Select the first search result.
- Enter "regedit" after "Open:". Then press "Enter".
- The registry editor appears. Open the following folders one after the other: "HKEY_CURRENT_USER" -> "Software" -> "Microsoft" -> "Windows" -> "CurrentVersion" -> "Policies". Select the last order "Policies" with a left click.
- Now see if you discover a "DWORD value" called "NoThemesTab". If you find it, it must be removed. To do this, select the entry with a left click and then click on "Delete".
- Restart your computer and log on. Now you can right-click on the desktop and set a new design via "Customize".
The instructions refer to Windows 7 Home Premium. These Windows 7 themes provide a new coat of paint on your desktop.