Windows 7: Alternating between 2 desktops with a hotkey shortcut?

I'm a gamer and I want to have 2 desktops such as 1 with a character of the game I play for when I'm with friends and 1 of a lightning storm when I'm out in public. Is there a shortcut such as pressing CRT+S or WIN+S to change desktops so when im in public and I have the wrong desktop I can press the hotkey to change it and change it back when im with friends?

Hello

To switch displays, hold down left CTRL + left Windows Key, and use the left and right arrow keys to cycle through the available displays.

BTW welcome to the forum

Wait so how do I set up the 2 picture to be able to cycle through them manually? and thank you

EDIT: I put both of them so that they will switch but the shortcut hotkey you said doesn't work. It changes to a time set but I want to to stay 1 background until I manually want it changed without having to actually change it every single time

Ok so I found how to change it but how do I take off the 1 day auto change? I want to keep 1 permanent until I want to change it

Sound's good

it's up to you i don't know how to turn off the 1 day auto change sorry