Pre-installed games won't work, plus other issues since reloading?

[jake c]

Hey, I have a dell Inspiron 1526, and I had an earlier problem where it would never boot. This was fixed by reloading the machine with the Window's CD, but ever since then I've had some issues. 1: The normally pre-installed games (Chess Titans, Freecell, etc) will no longer work. They are in the menu, but they don't do anything when I click on them. Chess Titans comes up with an error message about how I have an issue with the Direct3D, but I don't know what to do with that. 2: When I first had the laptop (before the reloading), whenever I plugged an external mouse into it, there was an option to disable the touchpad. This is no longer the case, and I have looked everywhere in the device manager to find the option to disable the touchpad, but the most I can do is to uninstall the drivers, which I don't really want to do. Also missing are the options to have the rightmost portion of the touchpad be a scroll bar, which I would like to have back. I was not the person who reloaded the machine (the IT tech at my school did it), nor was I there when he did it, so I have no idea what settings he had. I think very highly of the IT tech and I don't think it's anything he did. Any ideas on what the problem is or how to fix it?