If you're running Windows 7 Starter, you might not be able to change the background at all. If you're running Windows 7 Home Premium, right click the desktop and click Personalize.
3 Name: King Dude !zXqFpoplY6 : 2012-05-18 01:23 ID:jJu+SadJ [Del]
>>2 I doubt it's starter given that starter edition isn't even on the market for home use. It probably runs x64 W7 Home Premium.
In the future, google your question and if all else fails, consult the chat rooms.