A few quality (and small) games for windows.

All of the following casual games can be found, downloaded and tried for free, or purchased at Reflexive Arcade. Or you can just play the demo 'til time runs out, uninstall, delete the registry entry, and then reload it

Below are my favorites from the site.

Zuma
Wik and the Fable of Souls
Diner Dash - My wifes favorite
Master of Defense
Gold Miner