What is the name of the default theme that is installed with Windows XP?
Explanation
The Luna theme was introduced in Microsoft's Windows XP operating system and was available as an optional download for Windows XP Service Pack 2. It featured a more modern and rounded look compared to its predecessor, the 'Windows Classic' theme, which was also included as an option. The Luna theme aimed to create a brighter and more visually appealing interface, utilizing lighter colors such as blue and green, and incorporating subtle gradients and shadows to add depth. It served as the basis for subsequent themes released by Microsoft, including 'Royalty' and 'Arcadia'.