Today's bit of Windows Christmas time-wasting is Christmas Tale from Alive Games. The objective here is to solve a bunch of puzzles that involve stacking gift boxes and blocks of ice to allow Santa to get to the tree. The trial comes with a handful of puzzles. If you get addicted, there's a full version with 20 or so levels.

Previous 12 Days of holiday downloads for Windows:
Day 1, Day 2, Day 3, Day 4, Day 5, Day 6, Day 7