I bought a new laptop several months ago, and had the choice when installing my operating system of using either 32-bit or 64-bit. I'd like to change it to 32-bit if I can, because some of the programs I had on my old computer will not run on 64-bit. (One program in particular that I really want to use has an error message pop up when I insert the disk saying, "The version of this file is not compatible with the version of Windows you're running. Check your computer's system to see whether you need an x86 (32-bit) or x64 (64-bit) version of the program, and then contact the software publisher." ) Since it ran fine on Windows XP, I'm assuming that it doesn't like the 64-bit operating system configuration. I'm also noticing that none of my old games will open in full screen anymore. Would this also be a 32-bit/64-bit problem, or an incompatibility in my video card?