Did he use your Firefox? In that case, check your profile folder as follows, either: * "3-bar" menu button > "?" button > Troubleshooting Information * (menu bar) Help > Troubleshooting Information * type or paste about:support in the address bar and press Enter In the first table on the page, click the "Show Folder" button. This should launch a new window listing various files and folders in Windows Explorer. In the address bar, click "Firefox" or if there is a button to navigate upwards, click that twice. Right-click the file '''Desktop Background.bmp''' and choose Delete. If you do not find the file there, go back to the Desktop Background Control Panel and look at the path on disk under Firefox. Note: By default, it's a hidden folder, so follow this article to make it easier to browse to: http://windows.microsoft.com/en-us/windows/show-hidden-files Finally, I suggest saving your Windows theme so that you can instantly switch back to your preferred display settings if you or someone you used to trust messes them up.

Thank you! :) Now all is well; I appreciate it :)