Well, to make it simple, 64-bit applications have better performance in 64-bit system, while 32-bit ones have poorer behavior.
64-bit programs cannot run on 32-bit system, but 64-bit Computers compatible 32-bit programs, that’s why you can find a Program and files(x86) folder in C drive. Then How to tell if a program is 32-bit or 64-bit?
To check a program is 32-bit or 64-bit, there’re many different ways, we’ll just share the one most of us use. In different operating system, methods may vary, but don’t worry, it’s not that complicated.
Firstly, we open the Task Manager by pressing Ctrl + Shift + Esc or just right-click on the task bar and choose the option to open.
Then click More Details
Then click on the Details tab
And then right-click on any column and choose Select columns and scroll down to check the Platform option and click OK
Then you can see the program you’re running is 32-bit or 64-bit
Check a program is 32-bit or 64-bit is simpler in Windows 7 Disk Manager
Right-click on the task bar and choose Task Manager and click on the Processes tab, then the running 32-bit program will have extra message displays
*32 at the end of program name.
Partition Expert has separated installation and portable package for both 32-bit and 64-bit system, check the screen shot below. You can install the corresponding package or just directly run the portable edition from any USB device when you don’t want to install this program on any computer.