In Windows 7, right-click on my computer, add performance information and tools at the bottom, and then click view and print detailed performance and system information.
You will find 64 bit capable yes or no. If no is included, yes is included. The same goes for windows 8. You can access performance information and tools through system properties.
In short, the 32 bit (Home edition) is generally limited to 4 Gb of RAM. Up to 16 Gb is available in 64 bit (home edition). It is a comfort to use to increase virtual memory when running software that consumes a lot of RAM in 64 bit. Most 32-bit software can also run on 64 bit, and the 64-bit data transfer rate is twice as fast as 32 bit. Now you know the basics.