llewellen, welcome to the fourms! First of all, you would not be better off going back to XP over a single program, unless it's a part of your career, and you rely on it for a living. If that's your situation, you should switch back. What you can do is install XP inside of a VM to run your older programs on. There's an excellent one at File Hippo, go down to the lower left corner, under Developer Tools, the latest version of VM Player is there. Download it and install it just as you would with any other program. You will need a XP or Win 2K install disc with a vaild COA, to give you an OS to install within it. It functions as a PC within a PC, you don't have to add a ton of programs to it, but you can install what you need. Plus you need to install an anti-virus in it, too. This should meet your needs for your program to run. There's no need to downgrade your computer over a single program. 64 bit technology is no longer the future, it's today! It's far superior over 32 bit for more than one reason. But the most obvious one is on a 32 bit computer, you have access to only 3GB RAM, it doesn't matter if you have 8GB. With 64 bit, you can use as much RAM as your system configuration will allow. 4GB is considered a happy medium, some has 6GB and a few has 8GB. But in order for you to access this RAM, you must have 64 bit installed. If you have any questions about the VM or need further advice as to your inquiry, feel free to post back. That's what we're here for, to help one another.