First, in the Start menu, click on Run. If you can't find the Run option, hit WIN+R. (That's the key with the Windows icon on it.)

Type in msconfig, and go to the Startup tab. You're looking for two files. One begins with the string of letters "lph," and the second begins with "rhc". The examples provided are longer strings, "lphc35dj0e1an" and "rhc75dj0e1an", but after the first three letters, the strings are known to change on different computers. Uncheck the boxes next to both of them, then click on Apply and OK or Close at the bottom of the window.

Restart your computer normally. You'll notice that the background hasn't changed. To restore your desktop settings, you'll need to go to Start > Run again, or Win+R. This time, type in Gpedit.msc. On the left nav, look for User Configuration near the middle. Navigate through Administrative Templates, then Control Panel, and finally Display. When you click on display, you'll see a list of options open in the central pane. Right click on "Remove Display in Control Panel," and click "Properties." Then choose "Disabled."

Repeat those same steps for the following attributes: Hide Desktop, Prevent changing wallpaper, Hide Appearance and Themes, Hide Settings, and Hide Screen Saver. Change all to "Disabled," then hit Apply, OK, and restart your computer.

You will still see the Antivirus XP 2008 desktop "theme", but now you can change it. Anywhere on your desktop, right-click and select properties. The first tab that opens should allow you to change your theme. If you also suffer from massive icons, use the last tab on the right, Settings. In the middle of that tab's window you'll see a Screen Resolution option, most likely set to 800x600. Move the slider to the left to choose a more aesthetically appealing resolution.