So the Design of Windows 7, you can change
As for the next steps advanced rights, you first need to make sure that you as the "Administrator" logged in.
- Click "Start" and type "Run". Select the first search result.
- Enter behind the "Open:" the term "regedit". Then, press "Enter".
- It is the registry Editor will appear. You open one of the following folders: "HKEY_CURRENT_USER" -> "Software" -> "Microsoft" -> "Windows" > "CurrentVersion" -> "Policies". Select the last Order "Policies" with a left click.
- You see whether you will discover a "DWORD value" with the name "NoThemesTab". You can find him, he must be removed. To do this, select the entry with a left click and then click on "Delete".
- Restart your Computer and log in. Now you can click with the right mouse button on the Desktop and "Customize" a new Design set.

Registry-delete entry
The manual refers to Windows 7 Home Premium. For a new coat of paint on your Desktop, these Windows 7 Themes.