Only if you have Windows Ultimate.
Microsoft Tinker is a casual game that provides players with short puzzle game play sessions set in a warm, calming environment.
The objective of the game is to complete levels by navigating the robot around the obstacles to reach the end tile.
The game levels are organized into sets. Each set has twenty levels. The first level in each set is unlocked. To unlock the next level in a set, you must first complete the previous level. To obtain better results and earn achievement stars, you can return to levels previously completed.
Here is a YouTube video I put up showing it in action.
Ultimate Extras Sounds from Microsoft Tinker: Based on the positive feedback we received from the release of additional Windows Sound Schemes in April, we've integrated the unique audio sounds from Microsoft Tinker into a new sound scheme.
Windows DreamScene Content Pack #4 which adds three additional nature-setting Windows DreamScenes.
Via the Windows Vista Team Blog