Multiple PCs, same desktop? :(

So between myself and my wife we have a laptop, desktop and soon to be second desktop in our home. The problem we have, is that since they are all logged in via one account, if I change the background on the desktop it also changes the background on her laptop, and vis versa.

Now, while I am all for cute bunnies and other fuzzy critters, I'd much rather have a super cool abstract fractal background or something that isn't cute and fuzzy. Is there anyways in windows 8.1 to localize the desktop/visual and audio theme to each machine? Are we stuck with having to create a profile for her specifically?

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