The terms 32-bit and 64-bit refer to the way a computer's processor (CPU), handles information. The 64-bit version of Windows handles large amounts of random access memory (RAM) more effectively than a 32-bit system.
Software specifically designed for the 64-bit version of Windows will not work on the 32-bit version of Windows. However, most programs designed for the 32-bit version of Windows do work on the 64-bit version of Windows.
Device drivers designed for the 64-bit version of Windows don't work on computers running a 32-bit version of Windows. To learn how to check for drivers, see Microsoft's support page Update a driver for hardware that isn't working properly or go to the device manufacturer's website.