Do you still play any? I used to play these by the bucketload - it's hard to define exactly which games are the "Windows games" I'm talking about now since windowed versions of other games kicked in, but for a good idea, think of Minesweeper, Solitaire, JezzBall, Pipe Dream, Chip's Challenge etc. I guess the best way to say it would be "Windows 3.11 compatible"!
My favourites were probably those mentioned above. There was also this awesome castle one, an RPG, which was really funky but I can't remember the name of it... anyone have an idea?
EDIT: I also like FreeCell.Taipei is okay.
EDIT: Castle of the Winds! That's the one. I think I might re-download that sucker sometime. xD