Answer to "Hard drive compatibility between Toshiba models"The Satellite A75-S229 looks pretty close. You *might* be able to upgrade the processor using yours. I would highly recommend Sysprep if you're doing this with a Windows machine. Sysprep is a good friend. Unfortunately, Toshibas have a tendency to run hot. That is a pretty common complaint across the board with their laptops. Older enterprise grade Dell and HP laptops will usually cost comparatively and run cooler. For those you would be looking for a Latitude or EliteBook. Both of which have excellent documentation!