Microsoft has released many of the themes in the last two months, but this news is probably the best option if you want to give your computer a Christmas screensaver.
The so-called MSN Wallpaper and Screensaver Pack: 2012 holidays bring a totally new look to your desktop and are grouped into a simple setup program that does all of the customization work for you.
The package works on most versions of Windows that have been released to date, including Windows 7, Windows 8, Vista and XP.
However, this requires Internet Explorer 7 or later, Mozilla Firefox 3 or later, Google Chrome, and Safari 5.1.4 or later. Just pay attention to the installation, as it also offers you to change the browser home page and the default search engine when installing.