Keeping in sync with the holiday mood, Microsoft has released Holiday Lights Themepack for Windows 7 and it is now available for download from its Personalization Gallery.
“Brighten your desktop with sparkling images of holiday celebration and winter wonder in this Windows 7 theme.”
Download Page: Microsoft.
You might also want to check out these Beautiful Windows 7 Christmas Themes.
These links may also interest you:
Free Windows Live Messenger & Windows 7 Christmas Downloads
Comic: Christmas Mornings – Past & Present
Windows 7 Christmas themepack.
Also check out Animated Christmas Tree for Windows desktop.