Recommend an old game for me.

[Killergran]

blunty51 said:
Newer games that might work on your laptop:
Torchlight (dungeon crawler rpg)
Plants vs. Zombies (strategy)
World of Goo (physics puzzler)
Braid (platformer puzzler)

This list is full of win. Any of these games are worth fullprice, but can be purchased cheap. Plants vs. Zombies is especially interesting in your case, since you like strategy games (though I'd say it's a tower defense game) and it should run on almost any computer that hasn't broken down yet.