Previously we did a roundup of some of the Best Christmas themes for Windows 7. However those themes will not work on Windows XP. In this post you will find Christmas themes/theme pack which can be installed and used on Windows XP computers.
Themes do not work out of the box on Windows XP, you will have to apply some patches before you can install a them on XP. The download page contains links to download patches for your computer, make sure to apply them before you use the themes.