32-bit or 64-bit CPU

How to Determine Whether Computer is Using a 32-bit or 64-bit Processor

To find out if your computer is using a 32-bit or 64-bit Intel processor look up the model specifications at http://ark.intel.com/

If it is a 64-bit processor the following should be seen in the table  "Intel® 64: yes".

One can also run CPU-Z to find out. Under the CPU menu Instructions field you should see EM64T listed.

AMD  64-bit processors will show AMD64.

In Windows, once can also get a description of the processor by typing into a command prompt the following: wmic cpu get description

The instructions here are on how to find out if you are using a 32-bit or 64-bit CPU not how to find out if you are using a 32-bit or 64-bit version Windows operating system.  Some of the instructions found on other sites although claiming to address the former seem to be answering the latter question and not the former.