I should ask your laptop model, but since I'm little busy now I hope that helps to find what is strenching your 4:3 games to wide.
EDIT:
Try to look for some Hotkey in your laptop manual too.
In last case, if your display supports natively 4:3 format (what is not usual in laptops), we can create a shortcut to change windows res evrytime that you launch your game (well, you wont want that )