Actually, the problem was that since support was dropped for Windows Server 2003 a graphics driver was turned off with that update which caused some games not to run. However, the solution is to simply turn it back on and then your games will work. Now, here's the instructions that somebody who encountered the same problem e-mailed me:
Open the device manager
Under View, check Show hidden devices.
Then, click on Non-Plug and Play Drivers.
Double click Security Driver.
And on the Driver tab, click on Start.
Thank goodness for that. Stupid Microsoft.