Without activation, you cannot change your desktop wallpaper or themes.
: You can sometimes find the encrypted key in the registry at HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion under DigitalProductId . Tools like NirSoft ProduKey can often decode and display it for you. How to Register/Activate Once you have your key, follow these steps to activate: Topic: Windows 7 Keycode @ AskWoody windows 7 registration key
A Windows 7 registration key, also known as a product key, is a 25-character code required to activate a copy of the Windows 7 operating system. The key is used to verify that the software is genuine and has not been installed on more devices than allowed by the software license. Without activation, you cannot change your desktop wallpaper