Just hit the Windows logo and it'll fly and stuff. But DON'T HIT THE TASKBAR. If that happens, you'll get an error, and nobody wants that. Oh, also, if you click the stop sign on the top right you can click the Start button to bring up the Start Menu and get rid of it again. This isn't actually Windows XP though, it won't help you with your taxes. If this game does somehow help you with your taxes, please let me know and I'll fix the issue immediately.
Song is Windows XP Sounds Attempt. I don't own any of the images.