Open up your registry: Start -> Run
*Warning: Be careful what you are doing when in the registry. It’s very easy to make your computer non-usable if you edit the wrong entry.
Expand the following:
Double-click on DeskHtmlVersion, select the Decimal radio-button, and change the value from 272 to 0.
Then press OK.
Close out of Registry Editor, click in a blank area of your desktop, and press F5 to refresh the screen.
You should be back at your normal background/wallpaper.